HVAC Questions? Ask an HVAC Expert for Answers ASAP
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When you say compressor kicks off and on, do you mean whole outside unit, or just compressor?
The outside unit. It will run for between 30 seconds and five minutes and then just stop.
That could be either a bad thermostat or it could be going out on a low pressure switch
How would I check to determine which is the issue?
You could jumper past your thermostat and eliminate that as a possibility. You would do that by placing a jumper wire from R to Y at the furnace board.
Of course, turn power off first
Ok, I will try that. After turning off all power.
Then with jumper in place, turn power back on. If it still does this you know it's not the thermostat.
I will try that as soon as I get home. Thank you.
Does the outside unit go off for a while, then come on briefly then go off again?
Yes, it was doing that last night.
That sounds a lot like a low pressure switch kicking it out. But first let's make sure it's not a bad thermostat.
Eliminate the easier fix first. Will do.
So, I'll wait to hear back from you later then?
Yes, hopefully before 4. Possibly after 6
OK, good luck! Thanks you for using Just Answer and please don't forget to rate my service. (Bonuses are always appreciated). Feel free to post back with any additional questions.
OK, talk to you later
It was the low pressure switch. Getting it repaired tomorrow. Thanks for your help. Excellent service.