Went out for the day leaving the AC running. On our return the AC was blowing warm. I switched it off, went on the roof, took the cover off, cleaned the coil which had just a little bit of dirt on it. When I put everything back together the AC ran fine. Not sure that the minimal amount if dirt was the cause. Any ideas?

Low voltage? Could cause overheating and compressor shutdown. A voltmeter is your friend.

CA Traveler wrote:Low voltage? Could cause overheating and compressor shutdown. A voltmeter is your friend.Where would I check the voltage

How long were you on the roof? Is it possible the evaporator was frozen up and it thawed while you were cleaning the coils?

opnspaces wrote:How long were you on the roof? Is it possible the evaporator was frozen up and it thawed while you were cleaning the coils?No ice. But the AC was blowing warm air so I feel that if it froze then it thawed when the compressor shut down. Is the system designed to do that and stay shut down until the switch is thrown and then start back up when switched back on.

Picinisco wrote:CA Traveler wrote:Low voltage? Could cause overheating and compressor shutdown. A voltmeter is your friend.Where would I check the voltageAt any outlet. Best to have a plugin digital voltmeter operating all the time in a easy to see place. Turn off the air conditioner when voltage is down to 105.

AC quit blowing cold | Good Sam Community

Lynnmor
Explorer
Jul 04, 2020
Picinisco wrote:
CA Traveler wrote:
Low voltage? Could cause overheating and compressor shutdown. A voltmeter is your friend.

Where would I check the voltage

At any outlet. Best to have a plugin digital voltmeter operating all the time in a easy to see place. Turn off the air conditioner when voltage is down to 105.
Picinisco
Explorer
Jul 04, 2020
opnspaces wrote:
How long were you on the roof? Is it possible the evaporator was frozen up and it thawed while you were cleaning the coils?

No ice. But the AC was blowing warm air so I feel that if it froze then it thawed when the compressor shut down. Is the system designed to do that and stay shut down until the switch is thrown and then start back up when switched back on.
opnspaces
Navigator II
Jul 04, 2020
How long were you on the roof? Is it possible the evaporator was frozen up and it thawed while you were cleaning the coils?
Picinisco
Explorer
Jul 04, 2020
CA Traveler wrote:
Low voltage? Could cause overheating and compressor shutdown. A voltmeter is your friend.

Where would I check the voltage
CA_Traveler
Explorer III
Jul 04, 2020
Low voltage? Could cause overheating and compressor shutdown. A voltmeter is your friend.

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AC quit blowing cold

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