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

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  • 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.

  • Pastor Catlin Nov 29, 2017

    Model PTH153A50AB Heat does not coem on fan works

  • Susan Lutz Jan 07, 2018

    Im having the same issue,the fan comes on blows great but no heat,we did the heat reset and everything possible

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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.

Posted on Mar 09, 2014

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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.

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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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I've replaced many Amanda control boards. They have micro relays attached to the board. These relays are about a half inch by 1 inch in size, and control line voltage to the compressor and blower motor, and give up quite often. Its probably the board if its a digital controlled board. If it has manual, turn to select, type knob, it will be in that fan section knob. Hope this helps!

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I'm seeing a master switch on the control board, try a reset there. But, sounds like a bad element. You need to test continuity through your heater components. When testing a component unhook wires first, as they will still have continuity even if bad with wires attached.

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I have an Amana PTAC unit model no. PTH153B50AM. It will not heat, but the fan runs continuously in the heat mode. The unit has a label that says it has a manual reset for the heater, but no direction as...


First unplug the unit......Take the front cover off, take the wire screen off where the front fan is there is 4 or 5 screws that hold the plate that was under the screen. The electric heating elements are under that plate between the evaporator coil and the front blower wheel. It will lift straight up and give you access to the elements. In the electric heating element area there is a limit switch with a red or black button in the center of it push it to reset the limit it is on the right hand side by the controls. I wish I could find a picture to show you but I couldn't find one. It is not easy to get to... Hope this helps.

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To reset the power, locate your circuit breaker box. There should be a double-breaker for the Heat Pump and another double-breaker for the Air Handler. Turn them both off for at least 2-3 minutes. Then flip them back on and turn your thermostat back ON.

You're thermostat may also have a RESET button that you can push. I have to reset mine every time I change the batteries in it.

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I have a AMANA PTh153B50AE (PTAC unit). The air conditioner works fine. It is when I turn on my heater and it does not get warm. It just blows cold air. I have looked at the board and it appears that...


I have the same problem, and I found the manual reset inside the unit. Turn the power off, and unplug the unit. Remove the outer cover of the unit ( inside cover ) , and remove the 2 screws holding the " wire mesh " in the front of the cover. Pull the wire mesh up and out of the way, then carefully pull out the heating element.
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My reset was on the upper left connection of the wires... just looks like a small push button, but the reset is recessed a bit.
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The reset button is located behing a panel on the front of the unit that is labeled Heat Reset. If that label is gone then look around, it is a small hole, small enough for a paper clip to fit through.
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