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-   -   Help will AC cooling (http://www.diychatroom.com/f17/help-will-ac-cooling-115554/)

nbk9fmr 08-28-2011 07:42 PM

Help will AC cooling
 
OK here is brain buster.

AC will cool the house with no issues when its set at 74 degrees. If i change it to 75 or higher it will not cool (it will be 80+ degrees in the house).

I replaced the thermostat this weekend and same issue. I really don't want another 600 bill. Has anyone had or seen this issue before.

gregzoll 08-28-2011 08:45 PM

If it cools to 74 or lower, then there is not a problem.

nbk9fmr 08-28-2011 08:47 PM

ha ha other than a 400 elec bill. It was set at 76 degrees forever

nbk9fmr 08-28-2011 08:48 PM

I want to set the thermostat back to 76 and it would be 76 in the house not 80 degrees

beenthere 08-28-2011 09:03 PM

When you set it to 74, does it shut off, or does it run 24/7?

nbk9fmr 08-28-2011 09:12 PM

It runs 24/7

beenthere 08-28-2011 09:15 PM

Your compressor is probably running too hot, and when you set it to 75 an d it shuts off, the compressor's internal thermal over load opens. And takes probably close tom 3 hours to cool down and close again.

Try cleaning the condense coil.

nbk9fmr 08-28-2011 09:18 PM

Ok makes little sense but why if I set it to 75 it never gets cold but on 74 its freezing

beenthere 08-28-2011 09:22 PM

Cause when you set it to 74, the condenser never shuts off. But at 75 it shuts off, and then doesn't restart after it shuts off for another 3 hours.

Yes, I'm making a wild guess. But its based on what little info you can/have provided.

I like it 72. At 72 my A/C has long run times. At 73 it doesn't feel very cool.

nbk9fmr 08-28-2011 09:24 PM

Ok I got it now I will try that thanks so much for the info

Doc Holliday 08-28-2011 09:49 PM

You might want to have a tech come out and check that charge.

nbk9fmr 09-01-2011 06:55 AM

Update

I washed out the coils and alot of dirty flushed out. So far so good set the ac back to 75 and its been running well. Keeping my fingers crossed

Thanks for the help


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