Window a/c turns on and off frequently after cooling


Old 07-23-12, 10:33 PM
Thread Starter
Join Date: May 2006
Posts: 24
Window a/c turns on and off frequently after cooling

Hi. My window ac cools fine, and the coils are clean, but after the room is cool it cycles on and off more often than it should, on for 2 minutes off for 4, or about that. Sometimes on for 30 seconds. That's not enough time for cooling to even take effect, so what's going on? I think it must be an over sensitive thermostat, or control board problem. I want to fix this because it's not good for the motors.

Model: Kenmore 580.75062501 (the low profile model) purchased about 4 years ago. It has always had this issue, but it's somewhat worse now.

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Old 07-24-12, 08:20 AM
Join Date: May 2008
Location: Wisconsin USA
Posts: 715
Always use a large floor fan to circulate the air to the A/C's Return or away from the units output air.

You can cool a lot larger areas with a small room unit.

All A/C systems should have incremental adjustable TH differential temp-settings of up to around 3-F degrees max.

Example; on at 77-F off at 75-F.

Last edited by HVAC RETIRED; 07-24-12 at 08:22 AM. Reason: Example...
Old 07-24-12, 08:22 AM
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Join Date: Oct 2004
Location: WI/MN
Posts: 19,251
Upvotes Received: 37
Window units are notorious for pulling their vented air back into their intakes, thus not cooling the room as one would intuit they should. Moving the air around the room with a fan or creating more physical separation of the intake and exhaust on the unit will help.

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