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A/c comes on and works fine for about thirty mins then outside fan cuts off and you have to eighter turn off the mains or turn thermostat up to cut off compressor you can not turn thermostat to off and get compressor to turn off

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  • ncjdog Jun 02, 2008

    turns out the problem was the circuit board it was calling for the unit to go into defrost mode thanks for the attempt to help

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Check the compressor relay for sticking some bard units if it is a package unit were bad for this

Posted on May 08, 2008

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Eb20b/ electric furnance/ blower wont shut-off after heat kicks out, got to kill breaker , runs all the time, installed new thermostat, no change?????? Its cold??????


Check the thermostat and make sure the fan switch is set on "Auto". If it is set on "ON" the blower will run constantly.

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You need to check the volts at the motor while it's running, to make sure some safety is not shutting it off. Then check the amps on the motor while it's running. Also you need to check your capacitor and wiring.

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My American Standard Heritage 11 unit was not working properly when i came home from work and the temperture in the house according to the thermostat show the temperture in the house to be 85 degree&#


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Aug 27, 2012 | Air Conditioners

1 Answer

Have a goodman heat pump and air mover smelt plastic burning and cut tremostat off fan continues to run with a little warm air coming out with it off on thermostat


Hi, did you smell this plastic burning at the thermostat? The stat is only low voltage, 24 volts but may have shorted the fan contacts together causing the fan to run. The way to check is to take the first section of the stat off. Get to the wires coming in. Should have several since it is a heat-pump, but remove the red wire and tape or clip the bare end off. Turn on breaker back on. If the fan stays off, the stat is faulty. Make sure you buy a heat-pump stat. If fan keeps running, the problem will be in the main board/defrost board. It has shorted causing the fan to run and this is where the smell came from. You can sometimes remove the 4 screws to board and look at the back and if your lucky you will see the burned spot. Make sure the breaker is off first. Let me know. Good luck,
Shastalaker7
A/C and Heating contractor.

Mar 19, 2012 | Air Conditioners

1 Answer

I just put in this new thermostat, I believe all the wiring to be correct i have one extra wire (brown) that should be a common wire used to keep the display lit. when I turn the unit on cool ( with the...


Heat pumps require specific heat pump thermostat. If you are trying to install a thermostat that is generic forget it. A heat pump is a diff animal than a central unit. Get the thermostat that matches your system. A generic won't cut it.

Aug 13, 2011 | Air Conditioners

1 Answer

AC WORKS FINE HEAT COMES ON BUT WHEN TEMP IS REACHED FAN NEVER GOES OFF AND TROUBLE WITH HEAT COMING BACK ON


When temp reached to thermostat level heatewr only will cut off not the blower. And secondly all thermostat at heat stage will cut off at the end of +2 degree and cut in starting of -2 degree.

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Fan cutting on and off every 5 mins


The only thing that is going to but the fan off is the thermostat. When the fan stops, immediately check the thermostat on the wall. See is there is power between the B terminal and the GH terminal. If none, then replace the thermostat. If there is, then replace the control board in the AC. That means that the fan relay on the printed circuit board is weak.

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2 Answers

Goodman compressor cuts off when temp too high


I believe you have 1 of 2 problems going on here your system may be overcharged causing the compressor to cut out on a overload relay circuit internally, or it also could be tripping out a high pressure switch which could be from an overcharged system or a dirty condenser. I would have the tech come out on a 90 degree day and put the gauges on and check the pressures while it is operating under a full load.

Hope this helps you.
Please rate me

Jul 19, 2008 | Goodman CLQ36AR49 Air Conditioner

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