Question about Amana PTH123B25AJ Heat Pump Air Conditioner

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Amana PTAC Unit is not producing heat. Fan works fine. can not locate manual reset for heat although a label on the unit says there is one. I have an Amana pth153b35ae ptac unit that the heat will not come on. The compressor will run in the cooling mode but not in heat mode. I verified the switching valve is working and the capacitor seems to be fine as the compressor will run in cooling mode. The thermostats seem to be functional because relays can be heard clearly when changing temperature setting. I am leaning toward the control board as the problem but would appreciate any other thoughts on this problem. Thanks.

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  • inohio Jan 13, 2009

    please show digram where this is located. thank you..........



    the reset is the size of a pencil tip and is located below the control board on the sheet metal you will see the pin hole,you have to remove the cover to see it



    dont know where this is at.....picture please....

  • inohio Jan 13, 2009

    please show a picture of this location,,,,,

    """the reset is the size of a pencil tip and is located below the control board on the sheet metal you will see the pin hole,you have to remove the cover to see it '''''''''''''''''''''


    thank you

  • biblejeep Nov 25, 2010

    i push the reset botton and it won't come on what can i do there are tow buttons 1. reset 2. reset i put both but non is working we have only use it 4 times from last year when we got it

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I know this is late but I had to add a solution to this problem since I had the exact same problem and was able to solve it. The probelm is not your control board. On these units, the heat pump compressor will not kick in unless the temperature you set on the control panel is within 2-1/4 degrees (or 4 degrees depending on your unit model. Otherwise, the unit locks out the compressor until the electric heat coil bring the indoor temperature up to that level - and then will switch the compressor back on for heat pump operation. So the problem is not the control panel or the compressor, it the electric heat coil. The coil has two manual limit switches on it that may be tripped and should be checked. The coil can be easily accessed by shutting down the power, removing 4 screws around the air outlet, pushing the screen up and sliding the panel out the top. The power wires can remain in place while the limit switches are reset. Hope it works.

Posted on Nov 06, 2011

  • John Bovee Nov 08, 2011

    Just to follow up in case anyone else is in need of solution: The problem in my case was a $1 part in the heater assembly called a thermal fuse. This looks like a little transistor and is connected to one end of the heating coil to keep the unit from overheating. The part is made by Thremodisc and is a MicroTemp G8 144-degree C TCO (Thermal Cutoff). The replacement part is a G5 with the model number G5A01144C and can be found at a few places online.

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I had a problem with the heat not coming on in really cold weather. After much reserch and trial and error I a came to the conclusion that the heating coil was not coming on. The cool will reverse on the first stage, heating coil will come on in the second stage.
Take the front cover off of the unit. Unscrew the screws on the wire mesh and the two screws on the front below them. Pull out the wire mesh and put it aside. Slowly lift the heatng coil assembly striaght up. Grab the area you just took the screws out of. Once you get the coil out you will see the wires are conected to some terminals. On top of one of the terminals it the MANUAL RESET. It does not say it but it has a button on top. Mine was the one on the far left. Push it in till it clicks. Reassemble the unit in reverse. Mine works fine now.

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You can try to manually reset the heat, however you will likely need to replace the control board altogether. You can purchase it from Amana. They are around $130. You will need to program the new board before it will operate, instructions are included. Take your time and make sure all of the wires are installed correctly or you will have problems.

Posted on Feb 10, 2009

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Posted on Nov 25, 2008

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The reset is the size of a pencil tip and is located below the control board on the sheet metal you will see the pin hole,you have to remove the cover to see it

Posted on Nov 17, 2008

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