My AC seems like it runs on fan mostly. It's not cooling. It cools when the compressor kicks on, but it doesn't stay on very long...no matter how low I have the thermonstat. Any suggestions?
Thanks,
Tony
You may have thermostat problems. If the blower and compresssor kicks on, that indicates their ok. If you have a two wire thermostat, you can tie those wires together to see if the unit will operate. BE SURE TO DISCONNECT POWER.
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Please reply with Model number of bottom of AC unit ( upper) . Can be seen from inside usually. Thermostat model, plus if controls are at the ceiling assy or at thermostat on wall.
I didn't know it had a light on the dash that said "cooling fan temp". My 93 doesn't. The cooling fans are controlled by the computer and turned on when the ac is running or when the engine reaches 220 degrees. A mechanic would check the fuse and relay for power and the fan motor for power and ground.
Your ac system is most likely low on freon, or the cooling fan is not working. When you turn on the ac the cooling fan should stay on. If it stays on then you are low on freon.
You say temp fan?If you mean the cooling fans,then the ac is out of freon most likely,the freon has to be in the system,and enough to kick the compressor on,therefore turning the cooling fan on.
you have to open the unit up or atleast see if the fan is failing. The blower motor is usually a double shaft and cool the compressor and also blows the air across the evaporator. Look for the air to stop blowing then the compressor to shake from overheating.
All window unit compressor have a thermal breaker mounted on it. It is to protect it from overload. On a hot summer compressor work harder to keep us cool. Sometimes this thermal breaker fails for good. Unplug the ac. Open it, on the compressor there is a bulging thing sometimes cover with rubber. Thats the thermal breaker. Check its continuity. If you don't have an ohmeter, just byspass the two terminal of the thermal breaker with wire. Plug it in, but be carefull, turn on your ac. The compressor should come on.
low voltage issues causes higher amp draw and equipment to run a lot harder. whats causing the low voltage problem to the equipment? high amp draw of the compressor could be causing it to overheat and trip until the compressor physically cools down.
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