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Top 10 Air Conditioner Cooling Problems Check out my youtube channel to learn more... #airconditioner #airconditioning #airconditionerrepair #taddydigest #tradejobs #Troubleshooting #cooling #hvaclife #hvactraining #hvacservice #hvaccareer #technicaltraining #ac #technician #hvacschool #homeowner #DIY #education #heatwave
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Tools & Hardware,Measuring Tools,Pressure Measuring Instruments,
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United States
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Refrigerant Air Conditioning Tools (1 Set), AC Diagnostic Manifold Gauge Set with Hose & Hook, Air Conditioning Refrigerant Charging Hoses with Diagnostic Manifold Gauge Set, AC Diagnostic Manifold Freon Gauge Set Fits for R12 R22 R502 R134A
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Taddy Digest
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The top 10 reasons your air conditioner is not cooling. Starting with number one, bad capacitor. How do you know? If you hear your compressor or your fan humming and it's not starting, you need to check your capacitor. How? This is a dual capacitor. This is a single capacitor. This capacitor is rated for 7.5 mfd and this capacitor is rated for 40 plus 5 mfd. So if you use your meter leads and you put them between C and H and you read a low mfd, lower than 40 between C and H or lower than 5 between C and F, then that means that you have a bad capacitor. And usually to identify a bad capacitor, the top will be rounded. It will not be flat like this. This dual capacitor between C and H is used to run the compressor. Between C and F, it's used to run the fan. And if you ever have a compressor or fan humming and it's not starting, you may need to check your capacitor. Use your meter, put it on mfd and read between C and H. And if you have a low reading, lower than what it's rated for, then you could have a bad capacitor. And that's number one. Number two reason your air conditioner is not cooling could be a bad contactor. And this is a contactor and this controls the power going to the motor and the fan. Whenever the coil, which is on the sides of the contactor, receives 24 volts, then the contacts close. And this provides power going through the contactor to your motors. So if your motors are not coming on, you may not have power on the load side of the contactor. This can be the line or input and this could be the load and the output. You take your meter, you measure the coil. If it's got 24 volts, then you should measure 240 here and 240 here. And if you measure 240 here and there's no 240 here, then your contacts could be burnt and they're underneath this cover. You may need to pull these screws off and the cover off so you can check the contacts. Also the contacts could be welded shut. So after carbon builds up, it could hold those contacts shut and that could keep your compressor and your outdoor fan running. And then that can make your unit freeze up if the indoor fan is not running. So bad contactor. Pretty easy to replace. Number three, a bad outdoor fan motor or a bad indoor fan motor. Outdoor fan motor is a closed type motor. You can see there's not a lot of openings for breathing for air because it's outdoors and you don't want rain pouring inside the motor. This is an indoor motor and it's an open type motor. It needs to breathe. Outdoor fan motors and indoor fan motors can go bad because the bearings can be bad. How do you know? You try to spin the shaft and if it spins freely, then the bearings aren't bad. But if you can't really spin it, it's hard to spin, could be bad bearings. Also you can go from side to side and if you've got play in that shaft, you've got a little bit of space or you hear some clinking or clanking, then that could indicate bad bearings. Don't go up and down. Go side to side when you're checking the bearings. Also I've seen these motors, the windings burn up. Why? Because you didn't you didn't maintenance your equipment, your outdoor coil is dirty and that's causing the heat not to be rejected and the motor is getting hot. Number four is a dirty outdoor coil. This is known as a condenser coil and the purpose is to reject heat. If the coil is dirty, you're going to have a high high side pressure. You're going to have a high head pressure and if you've got too much heat build up, then it's going to cause the fans to overheat and they may be in an overload because the coil is dirty. Make sure you clean the coil because that's going to lower the amps and that's going to lower the pressure and that's going to help the unit to operate more efficiently. Number five is a dirty indoor coil. If you have a dirty indoor coil, it's going to cause low airflow. You're not going to have as much air coming out of your vents, your supplier vents and it can cause the unit to freeze up. So this indoor coil could start to freeze up. Number six is low on charge and that means you probably have a leak. This is 410A, what is used right now in the industry and this is 422B. This is a replacement for R22. A unit that's low on charge could cause this coil, the indoor coil, to freeze up during the cooling operation. A low charge will cause the air coming out of your supply vents to not be as cold as it needs to be. So if the air coming out of your vents is not very cold, then that may indicate that you have a low refrigerant charge. The larger line coming from your air conditioner is known as the suction line or the vapor line and during the cooling operation, if your system is undercharged or there is a low charge, then this line may not be very cold and it's supposed to be cold if the charge is good. Number seven, dirty filter. A dirty filter can cause low airflow, a dirty filter can cause a indoor coil to freeze up and it can cause a low suction pressure. Number eight, closing your supply vents or covering them up. I've been in houses where furniture is covering up supply vents or supply vents are shut and if you don't have air coming out of all your supply vents, then your house is not going to cool properly. Number nine is bad thermostat. It doesn't happen often but it does happen. You'll turn it on cooling and it won't be sending a signal out to the equipment for the equipment to come on or you'll have a thermostat that reads a different temperature than the actual temperature in the house. Number 10 is something I run into quite often in the field as a technician and it's a low voltage short that causes a fuse to pop. If you've ever had a fuse like this pop in your furnace, then that means there is a short and it could be your thermostat, it could be your thermostat wire, but I would check the outdoor condenser section and I would look for wires that are touching copper. If you'll check out my videos on low voltage shorts, you can learn more on my YouTube channel. That's my top 10 most common problems for air conditioners not cooling in the field. I hope you enjoyed the video. If you want more videos like this and you're a technician, go check out my playlist HVAC Tips for Technicians on my YouTube channel Taddy Digest. If you're a homeowner wanting to learn more about saving money, learning more about your air conditioning system, check out my playlist HVAC Tips for Homeowners on my YouTube channel. If you learned something in today's video, let me know what it was down in the comments. If you got a question, questions can lead to new content, so put your questions down in the comment sections. If you like the video, hit the heart button and follow and if you didn't like the video, you got something hateful to say, put it down in the comments. I got thick skin, I can take it and maybe you can get it off your chest so you can live a healthier, happier, better life. You've been watching Taddy Digest. I'm Tad and I'll keep you cool if you let me.
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