If you own a split AC, then it is possible that your outside unit where the compressor is housed is not receiving power. The reason why the fan is still working is that it is not an issue for the inside unit. You will need to have some electrical knowledge to fix this problem. You will need to examine the wiring connecting the two units.No response from the Unit (won’t turn on, no air flow at all) Loud or clunky sounding noises ; Ice forming on or around your AC unit; Leaking AC unit (1.) Let’s tackle first the “no response from the unit” section. I’d first check to see if your AC unit is getting enough power to the systems.Check for Power. The first and most obvious thing to do when your compressor won’t start is to make sure that the unit is receiving power. It is always …The air conditioning (A/C) compressor clutch will not engage under the following conditions: • The A/C high side line pressure is over 2957 kPa (429 psi). • The A/C low side line pressure is under 138-172 kPa (20-25 psi). • Throttle angle is at 100 percent. • Engine speed is more than 5500 RPM.Jun 28, 2021 · Here are 7 reasons why your central air might not be responding. 1. Thermostat Issues. Check the AC thermostat first. It must be powered on with a functional battery before you have any hope of the air conditioner working. You also should check that the thermostat is not broken and is properly calibrated. Next he asked me to check the AC condensation overflow pipe to make sure that there wasn't a clog because if there is a clog the safety valve will cut off power to the thermostat. Sure enough, this was the issue. There was a 1 inch PVC pipe running up along the left out-side of my AC/heater that went down into a water pump that was clogged. 2. If your thermostat requires you to remove it from the wall to replace the batteries, with a wall plate left affixed to the wall, then it sounds like you didn't properly reattach it to the wall plate. There will be electrical contacts between the two halves, often long pins, that need to properly align.Mar 12, 2013 · The AC unit turns on but doesn’t cool: If your unit turns on but doesn’t cool, check your thermostat to be sure that it is set at the correct temperature. You should then check the condenser and evaporator for dirt and clogging. If too much dirt builds up, your unit may not turn on at all. The condenser unit returns on and off repeatedly ... 01 - Incoming Power Problem. Confirm the air conditioner is plugged in and there is power at the wall receptacle. If it has a 120 volt outlet, you can plug another small appliance into the recepticle to confirm there is power. For 220 volt units you will need to use a multimeter. If there is no power, confirm the circuit breaker has not tripped.May 2, 2016 · 2004 - 2008 Ford F150 - A/C compressor not kicking in - Hello, here I am again, seems like owning a Ford truck guarantees you a lifetime of issues, anyways, This time I'm having problems with my AC. It's fully charged but compressor doesn't kick in. Bypassed relay and it works fine. Replaced pressure sensor and... My RV’s Air Conditioner Compressor Won’t Start. One of the most common signs of an RV air conditioner compressor failure is the thermostat showing that the system is active and the fan is running, but only warm, stale air comes out. One of the first things to look at in a situation like this is the RV air conditioner compressor’s …Are you preparing for the RSCIT exam? Want to boost your chances of success on the online test? Look no further. In this article, we will provide you with some valuable tips and tr...The important thing to know is how to handle it. If your AC unit is humming but not turning on, the most likely issue you’re having is a broken capacitor. This can be fixed by replacing the capacitor. If you’re unlucky, your AC unit’s sudden “quit” could have to do with a broken motor. In this case, it’s often better to replace the ... Let’s take some time and explain all 8 reasons why your car’s air conditioning compressor won’t turn on. 1. Low Refrigerant in the AC System. This is by far the most common issue as to why your AC is not working. Low amounts of AC freon refrigerant will be detected by the AC pressure sensor switch, causing the AC not to kick in. Here’s how to reset your AC’s thermostat after a power outage: Turn off the thermostat and circuit breaker – Look for the system switch on your thermostat and circuit breaker and turn them off. Wait for 30 minutes before switching your AC’s thermostat back on – It takes roughly 30 minutes for your air conditioner’s internal ...July 5, 2023 Cooling. If your air conditioner is not working, check the fan on the outside unit. If it’s buzzing, but the fan is not spinning, you may have one of two issues. First, If the fan on your outside unit is not spinning, do a visual inspection to ensure it is not jammed. If there is an exceptional amount of dirt or debris around the ...Our AC unit tries to kick on (I can hear it trying), but won't. If I go outside and give the fan blades a gentle push with a stick the fan will turn, but the (compressor?) still won't kick on and make awesome coldness come through the vents. What part(s) might be faultly? I'm hoping this can be a remove and replace type of repair.Here’s how to reset your AC’s thermostat after a power outage: Turn off the thermostat and circuit breaker – Look for the system switch on your thermostat and circuit breaker and turn them off. Wait for 30 minutes before switching your AC’s thermostat back on – It takes roughly 30 minutes for your air conditioner’s internal ...Oct 3, 2022 · 1. Lack of maintenance. Lack of maintenance is probably our #1 source of service calls during the winter. It’s the most likely reason your heat won’t turn on. And more often than not, the problem is that your furnace is just plain dirty: A dirty blower motor can lead to equipment failure. 1. Clogged Air Filters. If you haven’t changed your air filters in a while, the accumulation of dirt and debris is going to obstruct the airflow. In turn, this will cause layer upon layer of ice to form over the AC coils. The more time goes by, the more ice will accumulate and may cause your air conditioner to shut off.According to the Postsecondary National Policy Institute (PNPI), only 19% of 18–24-year-old Native Americans are enrolled in higher education. Compare that to the overall U.S. popu...Turn the power back on and test it out. TL;DR: Thermostat malfunction is a common, easy to diagnose and fix issue. It is worth it to start your troubleshooting from here. 2. Tripped Circuit Breaker. A tripped …This question is about the ACE Elite™ Visa® Prepaid Debit Card (Pay-As-You-Go) @lisacahill • 05/17/19 This answer was first published on 05/17/19. For the most current information ... Get in touch with a licensed electrician to diagnose the issue and repair it. 2. Thermostat Problem. Your thermostat is a direct line of communication between your air conditioner and you. If your thermostat has problems, then there’s no way for your AC to know that it should switch on at a certain time. Compressor won't switch on if there is inadequate refrigerant. If the belt was off and system wasn't run for along time, the refrigerant likely mostly leaked out. If all the refrigerant has leaked out, the system is contaminated with moisture and needs to be vacuumed and the receiver-drier needs to be replaced.Oct 7, 2022 ... The motor it is connected to will keep trying to start up but won't be able to on its own without the capacitor's extra juice. The fan will then ...Air conditioner fans not working can be a sign of a frozen evaporator coil. The evaporator coil sits inside your home within the air handler unit (furnace or fan coil), pulling heat and humidity from indoor air as it passes through. The evaporator coil can freeze up as a result of indoor blower fan malfunction, low refrigerant charge, low ...Table of Contents. What to do when your AC compressor isn’t turning on. Fix the thermostat. Check the fuse or circuit breaker. Change the air filter. Clean the …1. Clogged Air Filters. If you haven’t changed your air filters in a while, the accumulation of dirt and debris is going to obstruct the airflow. In turn, this will cause …Clutch disc moves but won’t engage. The spacing between the compressor clutch disc and the pulley must be exact. This is referred to as the air gap. If the gap is too wide, the electromagnet won’t be able to pull the clutch disc in with enough force to mate with the pulley. The only way to diagnose compressor clutch air gap is with a feeler ...Low stays at up around 80. Seems like some is getting in as after I removed the gauges and press the schrader on the low port some refrigerant comes out. And when closing the low side of the gauges it drops the pressure down to about 20 psi. I tried jumping the compressor for a few seconds and it kicks on but the pressures don't change.An extra-point kick in the National Football League is a 20-yard kick. Extra points always follow a touchdown, allowing teams the opportunity to score an additional point after ear...Feb 11, 2022 · Here are 5 main things that can stop your ac compressor from turning on. 1. Power. If you notice your compressor not working after turning on your thermostat, there could be a power cut to your outdoor unit. Head over to check your condenser unit and find out if both your compressor and the fans are not working. May 6, 2020 · Compressor is not running. Checked the fuse and relay for the compressor clutch. Both are good. Put A/C gauges on the Hi/Low pressure side. SInce compressor is not running, both read the same and it is at 100psi. Next step is to check for voltage at the compressor clutch and see if I have 12V there. Also need to check the Pressure sensor to ... AC Hotel by Marriott Milan S..." Convention Bureau Italia on Instagram: "Monday: let's kick off the week by introducing one of our partners! AC Hotel by Marriott Milan Sesto - An …A faulty thermostat can prevent your air conditioner from turning on. Make sure the thermostat is set to a temperature lower than the current room temperature.Get in touch with a licensed electrician to diagnose the issue and repair it. 2. Thermostat Problem. Your thermostat is a direct line of communication between your air conditioner …May 27, 2015 · Tradesman Podcast - http://thetradesman.libsyn.com HVAC Shop Talk Podcast - http://workingjoes.libsyn.com Get on the Shop Talk Email List - http://eepurl.com... A/C Compressor wont kick on. Okay so i have owned my 2013 Si coupe for a couple months now, and the a/c was always pretty dang cold. Now lately when i turn on either the a/c or max a/c button, i can see the radiator fans kick on, but the clutch on the compressor does nothing. I made sure it was connected P), i also checked the 134a …Mar 8, 2023 ... Reasons Your Thermostat Clicks but the AC Does Not Turn On · Dirty Air Filter · Incorrect Thermostat Settings · Faulty Thermostat · Faul...Are you a frequent shopper at Ace Hardware? If so, then you definitely want to take advantage of the My Ace Rewards program. This loyalty program is designed to reward customers li...Oct 7, 2022 ... The motor it is connected to will keep trying to start up but won't be able to on its own without the capacitor's extra juice. The fan will then ...5. Warm Air or Hot Condenser Unit. When your compressor is completely cooked, it will start spewing out warm air instead of cool air. In some cases, it might even cause the AC compressor not turning on at all. When this happens, you will likely need to replace the whole thing.Sounds like your ac has low refrigerant or your ac clutch isn’t doing it’s job. For refrigerant, it is very easy. Look up Chris fix video on YouTube how to add refrigerant. Trust me he will tell you better than anyone on here will. For clutch, with car running, turn ac on and look for a spinning ac clutch. If clutch is not spinning it means ...Medicine Matters Sharing successes, challenges and daily happenings in the Department of Medicine ACS Pfizer Disparities Nadia Hansel, MD, MPH, is the interim director of the Depar...Low stays at up around 80. Seems like some is getting in as after I removed the gauges and press the schrader on the low port some refrigerant comes out. And when closing the low side of the gauges it drops the pressure down to about 20 psi. I tried jumping the compressor for a few seconds and it kicks on but the pressures don't change.The important thing to know is how to handle it. If your AC unit is humming but not turning on, the most likely issue you’re having is a broken capacitor. This can be fixed by replacing the capacitor. If you’re unlucky, your AC unit’s sudden “quit” could have to do with a broken motor. In this case, it’s often better to replace the ...RELATED: 5 Signs of a Bad Car AC Condenser Fan (& Replacement Cost) 2. Check Coolant Level. The next step you want to do is to check the coolant level. If the coolant is low, it can cause many different problems with the radiator fan. Checking the coolant level is easy, just open the hood and locate the coolant reservoir.May 6, 2020 · Compressor is not running. Checked the fuse and relay for the compressor clutch. Both are good. Put A/C gauges on the Hi/Low pressure side. SInce compressor is not running, both read the same and it is at 100psi. Next step is to check for voltage at the compressor clutch and see if I have 12V there. Also need to check the Pressure sensor to ... Condenser works. A coil freezes. Blower won't. Trane XE 78. Condenser works. A coil freezes. Blower won't kick on. Manual blower (Fan on) works and kicks the blower on ok. As soon as A … read more.Sep 16, 2005. Fort Lauderdale, Florida. went to try & fix my a/c today. its fully charged. but the compressor clutch wont kick on unless i jumped the relay. Had the A/c machine hooked up to it and also noticed that my LOW side pressure is going negative ( into vacumm ) ...i just replaced the expansion valve. I sucked the A/C out for 30mins with ...After inspecting the belt, there can only be two things left that could be happening: 1. The clutch is not getting a signal to turn on. This indicates some form of wiring problem. -or-. 2. The AC compressor is getting a command to turn on but is no longer able to, which would indicate that it needs replacing. 2.2. Tripped Breaker or Blown Fuse. You need electricity to power your air conditioner. So if the AC’s breaker has tripped or its fuse has blown (for a pre-1970 …A. Penland. Ford Senior Master Technic... Vocational, Technical or Tra... Ac problems. Just ac the compressor wont kick on. 2010 F150. I have replaced the only pressure switch I see which is located on the passenger side on the vehicle near the battery. When I jump the relay the … read more.When the RV air conditioner compressor not coming on, a clamp-on ammeter is a perfect tool to check its health. The compressor has an ampere rating and the reading on the ammeter should not cross that number. If it does, the compressor is toast. Examine the compressor with a clamp-on ammeter. If you are sure that a bad …Jul 17, 2018 ... Without a proper refrigerant, your home will not be able to get cool. Some signs that your AC unit may be low on coolant include warm/hot air ...From underneath the glove box, disconnect the three A/C electrical connectors. 10. Disconnect the electrical connector and retainer located on the floor between the two front seats. 11. NOTE: To make sure of proper location during installation, index-mark the position of the steering column shaft before removing the pinch bolt. Get in touch with a licensed electrician to diagnose the issue and repair it. 2. Thermostat Problem. Your thermostat is a direct line of communication between your air conditioner and you. If your thermostat has problems, then there’s no way for your AC to know that it should switch on at a certain time. The process is simple if you know what you are up to. Start by disconnecting the AC unit from the electrical source, remove the panel to access the capacitor, check …Check the Power Supply. Sometimes, a power switch can be accidentally turned off. Look for your home's central air conditioner power supply and make sure all …Mar 9, 2014 · 2-5 Ohms resistance across compressor coil. Check for power at Compressor electrical connection w/key on, AC light illuminated. Try to spin fan clutch while cool - if it spins, you have a problem. Replace. Consider cleaning all AC electrical connections in the engine bay AND in the CABIN. 1. Temperature Control or Thermostat Problem. If your air conditioner coil is upwards, then there may be a problem with temperature control or thermostat. This part monitors the air temperature of the room. If necessary, indicates the compressor to be started to start the cooling. There is a most common reason for outside ac unit not …Check for Power. The first and most obvious thing to do when your compressor won’t start is to make sure that the unit is receiving power. It is always …Your air conditioner runs on electricity, so if it won't power on, locate your home's electrical panel (breaker box). Look for a blown fuse or a tripped ...If the air conditioner unit is blowing air inside but the outside unit is not running, there are a few possible causes. The most common cause is that the breaker has tripped or blown. Another possibility is that the condenser coils are dirty and need to be cleaned. Finally, it could be that the Freon levels are low and need to be refilled.Set the temperature five degrees higher than the room temperature and see if the furnace kicks on. ... airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won’t warm up. If the blower is running but no heat is coming out, replace the filter. ... These are dampers or air ...Mar 12, 2013 · The AC unit turns on but doesn’t cool: If your unit turns on but doesn’t cool, check your thermostat to be sure that it is set at the correct temperature. You should then check the condenser and evaporator for dirt and clogging. If too much dirt builds up, your unit may not turn on at all. The condenser unit returns on and off repeatedly ... Turn the power back on and test it out. TL;DR: Thermostat malfunction is a common, easy to diagnose and fix issue. It is worth it to start your troubleshooting from here. 2. Tripped Circuit Breaker. A tripped …We’ll take you from meltdown to cool down with 5 easy troubleshooting steps. Image Source: Wikimedia Commons. Steps to Troubleshoot AC Compressor Not Turning On. Checking the Thermostat. Inspecting Electrical Components. Evaluating the Capacitor and Contactor. Identifying Refrigerant Leaks.Join Date: Mar 2011. Location: Hamilton, Ohio. Posts: 1,029. Likes: 0. Received 35 Likes on 33 Posts. You can try and jump the high side pressure switch, that should kick the compressor on to at least see if its …Feb 10, 2022 · Bad Compressor Capacitor. If your ac compressor won’t turn on but your fan is running, this could be a sign that the capacitor that powers your compressor is not working. Newer outside condenser units come with dual capacitors, one part that powers the compressor and the other one that powers the fan motor. With time, any of these two parts ... Incorrect settings can lead to the compressor not kicking on. Mode: Make sure your thermostat is set to ‘Cool’ and not ‘Heat’ or ‘Off.’. Temperature Setting: The set …Oct 17, 2014 ... Check the power supply. When your AC compressor won't turn on, check to see that it's receiving power. This may seem like a no-brainer, but one ...Air conditioner fans not working can be a sign of a frozen evaporator coil. The evaporator coil sits inside your home within the air handler unit (furnace or fan coil), pulling heat and humidity from indoor air as it passes through. The evaporator coil can freeze up as a result of indoor blower fan malfunction, low refrigerant charge, low ...2. Tripped Breaker or Blown Fuse. You need electricity to power your air conditioner. So if the AC’s breaker has tripped or its fuse has blown (for a pre-1970 …2.8l. Transmission. Automatic. Mar 16, 2012. #3. You can trace it with a test light with the engine running turn the a/c on and see if your getting power to the clutch, If so the clutch is bad. then work your way back to the computer. To check if the system is dead carefully depress one of the schrader valves lightly to see if refrigerant comes ...8 Common Causes Of “Air Conditioner Not Blowing Cold Air” We have broken down each cause into 3 sections to help you out: What part of AC might be causing the “not blowing …A. Penland. Ford Senior Master Technic... Vocational, Technical or Tra... Ac problems. Just ac the compressor wont kick on. 2010 F150. I have replaced the only pressure switch I see which is located on the passenger side on the vehicle near the battery. When I jump the relay the … read more.A/c not working compresser won't even kick on. A/c not working compresser won't even kick on. Fuse under dash and hood both fine. Tried tapping clutch but no luck. Ran fine last summer. Answered in 21 minutes by: Chevy Mechanic: Dr.Automotive. Dr.Automotive. Category: Chevy.If the air conditioner unit is blowing air inside but the outside unit is not running, there are a few possible causes. The most common cause is that the breaker has tripped or blown. Another possibility is that the condenser coils are dirty and need to be cleaned. Finally, it could be that the Freon levels are low and need to be refilled.Aug 14, 2019 · Sounds like you have a leak somewhere in the AC system. If the pressure gets too low, the compressor will not kick on and hence will not draw in any refrigerant. AC leak stopper is generally snake oil. You need to have the system diagnosed and the leak repaired. Warning, depending on where the leak has occurred, it may be expensive to repair. Jul 13, 2020 ... You change the thermostat setting from heat to cool, wait for the central air to kick on, and then… nothing. Some commone issues when you AC ...3 posts · Joined 2011. #15 · Jun 18, 2011. A/C Compressor will not come on. I replaced the CCRM located inside the passenger side inner fender, the A/C control head. The A/C is fully charged. Also, the Coolant fan will not continue to stay on when the Defroster or Max air is turned on.AC wont turn on and The Most Common Fix. Is your inside fan working but the unit outside not turning on? There's a very good chance that you have a blown cap... 01 - Incoming Power Problem. Confirm the air conditioner is plugged in and there is power at the wall receptacle. If it has a 120 volt outlet, you can plug another small appliance into the recepticle to confirm there is power. For 220 volt units you will need to use a multimeter. If there is no power, confirm the circuit breaker has not tripped. Look into your air filter’s housing and check the markings on your filter. If your furnace blower won’t turn on, check to confirm the arrows on the air filter are pointing in the correct direction. When the arrows are pointing in the wrong direction, change the orientation of the filter. Next, check the vents around the blower.Oct 3, 2022 · 1. Lack of maintenance. Lack of maintenance is probably our #1 source of service calls during the winter. It’s the most likely reason your heat won’t turn on. And more often than not, the problem is that your furnace is just plain dirty: A dirty blower motor can lead to equipment failure. Here are 10 common reasons why the A/C compressor won't turn on. Refrigerant levels. Electrical problems. AC compressor clutch. Evaporator temperature sensor. Pressure sensor. Engine faults. Bad A/C button or control module/head unit. A/C Compressor clutch relay.If you own a split AC, then it is possible that your outside unit where the compressor is housed is not receiving power. The reason why the fan is still working is that it is not an issue for the inside unit. You will need to have some electrical knowledge to fix this problem. You will need to examine the wiring connecting the two units.Bad Compressor Capacitor. If your ac compressor won’t turn on but your fan is running, this could be a sign that the capacitor that powers your compressor is not working. Newer outside condenser units come with dual capacitors, one part that powers the compressor and the other one that powers the fan motor. With time, any of these two …
Low stays at up around 80. Seems like some is getting in as after I removed the gauges and press the schrader on the low port some refrigerant comes out. And when closing the low side of the gauges it drops the pressure down to about 20 psi. I tried jumping the compressor for a few seconds and it kicks on but the pressures don't change.. Hip pop
Once the leak has been found, this must be closed again by replacing the respective component. 4. Dirty evaporator. Dirty evaporator can also be the reason for AC problems on your Ford F-150. Cabin air filter captures most of the dirt or other airborne particles, but some escape and fall on to the evaporator.I checked and the compressor is not engaging. I replaced the clutch relay under the hood and the AC fuse next to it, as well as the low pressure switch located on top of the compressor. I jumped the relay with a paperclip, and the compressor came on and was blowing cold air. I was able to add freon and oil. Once I removed the jumper and put …Jul 5, 2023 · July 5, 2023 Cooling. If your air conditioner is not working, check the fan on the outside unit. If it’s buzzing, but the fan is not spinning, you may have one of two issues. First, If the fan on your outside unit is not spinning, do a visual inspection to ensure it is not jammed. If there is an exceptional amount of dirt or debris around the ... An extra-point kick in the National Football League is a 20-yard kick. Extra points always follow a touchdown, allowing teams the opportunity to score an additional point after ear...With a test light or voltmeter, one of the wires should have positive voltage. Assuming the climate control unit inside the car is working correctly. If one has power when u switch it on inside and then when U turn it off the wire that had power doesn’t anymore then check to make sure the other wire is grounded. If it is the compressor is bad.Here are the most common reasons an outdoor air conditioner won’t kick on when it should: Tripped Circuit Breaker. The most straightforward reason your outdoor AC won’t turn on is that the dedicated circuit breaker powering the system has tripped. Most external AC components have a circuit breaker in the electrical panel that provides …Check for Power. The first and most obvious thing to do when your compressor won’t start is to make sure that the unit is receiving power. It is always …Why Won't My Air Conditioner Turn Off? · 1. Incorrect Thermostat Settings · 2. Bad Thermostat · 3. Electrical Problems · 4. Stuck Fan Limit Switch &... Next he asked me to check the AC condensation overflow pipe to make sure that there wasn't a clog because if there is a clog the safety valve will cut off power to the thermostat. Sure enough, this was the issue. There was a 1 inch PVC pipe running up along the left out-side of my AC/heater that went down into a water pump that was clogged. However, your furnace won’t kick on when the circuit board is defective, and each time there is calling for heating from the thermostat. ... To Find 24/7 AC/Heater Repair In Your Area. Get a Free Repair Estimate. Airlucent.com. National Database. Call 1-877-342-2087 To Find 24/7 HVAC Repair In Your Area. Address. 6585 Hwy 431 S. Suite 801 … Check the wiring at your ecobee. 2. Check the wiring at your furnace/air handler. 3. Check the equipment configuration on your thermostat. 4. Check your threshold settings. If you've followed all of the troubleshooting steps above and your air conditioner still isn't turning on, please contact Customer Support for further assistance. Last thing I'd try is removing either the high or low pressure filler valve cap and giving the valve button inside there a QUICK push/tap with a screwdriver. A good bit of "air" should come out. If it's a small hiss, or nothing at all then you're low / out. It should be much louder than pressing a tire valve in.May 2, 2016 · 2004 - 2008 Ford F150 - A/C compressor not kicking in - Hello, here I am again, seems like owning a Ford truck guarantees you a lifetime of issues, anyways, This time I'm having problems with my AC. It's fully charged but compressor doesn't kick in. Bypassed relay and it works fine. Replaced pressure sensor and... This question is about the ACE Elite™ Visa® Prepaid Debit Card (Pay-As-You-Go) @kendallmorris • 04/13/18 This answer was first published on 04/13/18. For the most current informati...You use a 'jumper' wire. Unplug the switch from the connector. Insert the jumper wire. The compressor should come on. Use your freon pressure gauge to judge the freon level in the system. If the gauge indicates that the freon charge is adequate, then you have a bad switch. (The AC must be turned on in the cab....I am just covering all the …Air conditioner fans not working can be a sign of a frozen evaporator coil. The evaporator coil sits inside your home within the air handler unit (furnace or fan coil), pulling heat and humidity from indoor air as it passes through. The evaporator coil can freeze up as a result of indoor blower fan malfunction, low refrigerant charge, low ....