AC Cooling Intermittently
#1
07-06-14, 10:25 PM
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AC Cooling Intermittently
My AC has established a pattern of only blowing cold air from about 3pm til 7. In the last 3 or 4 days, I can't get any cold air during the evening. My AC guy is convinced my problem is the thermostat bc my unit appears to be in good shape. Though, when I switched my downstairs t-stat (problem) with my upstairs t-stat (no problem), I had no change.
What could cause a problem like this? What should I check?
Thanks!
What could cause a problem like this? What should I check?
Thanks!
#2
07-06-14, 10:36 PM
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Welcome to the forums.
You have two distinct pieces of equipment. You have the outside compressor unit and the inside air handler or furnace. You need to determine if either or neither is working.
You have two distinct pieces of equipment. You have the outside compressor unit and the inside air handler or furnace. You need to determine if either or neither is working.
#3
07-06-14, 10:41 PM
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When I'm not getting cold air, neither unit is doing anything. But a few hours later everything works fine.
#4
07-06-14, 11:01 PM
Group Moderator
One thing you can check for is a plugged drain line from the furnace/air handler. If you have a condensate pump it could be malfunctioning. They are usually setup to shut the A/C down if there is an overflow condition.
I doubt it's a thermostat problem. You may need the assistance of a voltmeter to check and find out where the control voltages are getting lost.
I doubt it's a thermostat problem. You may need the assistance of a voltmeter to check and find out where the control voltages are getting lost.
#5
07-07-14, 04:23 AM
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When U switched the t-stats - no problem.
The problem T-stat didn't accidently get programmed to raise the temp, or something, during that program cycle?
Check all of the programmable cycle periods.
You could remove the batteries then replace them in a few minutes & entirely reprogram the T-stat so U know it is correct.
The problem T-stat didn't accidently get programmed to raise the temp, or something, during that program cycle?
Check all of the programmable cycle periods.
You could remove the batteries then replace them in a few minutes & entirely reprogram the T-stat so U know it is correct.
#6
07-07-14, 06:06 AM
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#7
07-07-14, 08:51 AM
I agree with PJmax. Something may be shutting it down and a plugged drain makes sense, if there is a safety hooked up to either a condensate pump, or an overflow switch.
