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Unit starts and stops to often

My Amana central heat and air pump unit comes on and runs for a few minutes then shuts down for a few minutes then starts back up over and over again...... Is this normal?

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No this is not normal. You have a problem refered to as "short cycling". This is an indication of low refrigerant charge. You need to have the unit leak checked, repaired and recharged,

Posted on Jun 01, 2009

  • kosmosx Sep 16, 2010

    I actually had this problem just yesterday, after they installed a whole new system. I wound up having to rewire the thermostat and circuit board myself on the furnace/blower to get it working right. They tried to use the C wire as a 2nd stage heat W2 wire, since I have a 2nd stage heater. So connecting that back properly fixed my problem. No I'm left with needing another wire run to the thermostat to allow for proper staging of Heat. Stage 1 runs at 50-90% full heat/speed, depending on settings, and stage 2 is normal full speed/full heat. You can also have a two stage condenser too, but I do not... that would use the Y and Y2 wires. Your thermostat has to support 2 stage though, mine does. Honeywell 6000 Pro. I hope this helps anyone else out there that had this problem. Oh, and make sure the shipping bracket wasn't left on the blower too! They left that on too, so it was loud when turning on and turning off, when the blower was running slowly. -Stu

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1 Answer

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If it shuts down completely, it is probably a safety device. Doubt if it's the t'stat. This sounds like something is overheating and the safety is shutting down the unit. The safety could be the fan delay/limit switch. Also, there are usually several "Thermal Disc" type safety devices located near and around the heat exchanger. These can go bad. In other words, they can "Trip" at a temperature lower than the rated temp the devices is supposed to trip.
I would look here for you problem. Good Luck

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