20 Most Recent Amana GMH81405DN 140,000 BTU 80% Gas Furnace, 2 Stage, Multi-Speed, Questions & Answers

Robert, that is a typical indication of the furnace cycling on its high temperature switch. Look for a dirty filter, return air blockage or any other thing that would cause air flow restriction across the heat exchanger. If nothing else is evident, possibly attempt changing the heating speed to medium low or medium high for heat to improve air flow. But if it worked with no changes prior to this problem, it has to be lack of air flow that is causing the issue.

The manual says it should automatically reset. However to manual reset the unit it says to "interrupt" the power supply. --which I think means unplug/turn off electric to unit for 20 seconds. If you do not have the manual go the manuf website and download it. --Also, this is a Goodman unit. If it does not reset something else it wrong that is preventing the unit from starting for safety reasons.

It could be clogged gas line or valve or main valve or control board or dirty nozzle and best way is get help from local service centre

I doubt it is something you can fix yourself--best bet is get a expert out before the issue gets worse or something that is good now gets damaged.

The important consideration is the rotational speed and adding extra horsepower really doesn't achieve anything because the motor isn't really under 'load' as it would be in say a winch. It is better to stick to OEM Specs https://www.google.com/search?q=amana+80+sse+blower+motor ..

Question edited for a lot more clarity. The new improved energy efficient versions.

The Improved Amana R-410A PTAC Unit Uses Less Energy

Amana PTAC https://www.amana-ptac.com > products > ptac Looking to buy an energy-efficient PTAC unit for your building? Buy the new Amana R-410A PTAC unit heat pump, which reduces energy consumption by 35%. Probably this one. Talk to your installer. https://www.amana-ptac.com/products/ptac/hec154j ..

Question edited for clarity and toss in some CAPS. You can get wired or wireless. https://www.amana-ptac.com/products/ptac Fitting https://www.google.com/search?q=amana+ptac+connect+to+wall+thermostat .

Maybe something here will help you.... https://ptac4less.com/blog/troubleshoot-reset-amana-ptac/

Does the power light come on? If yes, then you can do a reset as below: There is a master switch on the bottom left of the control board. Slide that to 'off' position. Then press the hot and cold switch/key together and then slide the master switch back to 'on'. Please put your response/observation here if that does not work or there is power light as asked on top. Thanks

i'm not familiar with your specific unit but ..sounds like an electronic gas value has gone bad or has a bad connection when that happened to my friend it wasn't that expensive to have it fixed .. BYW it acted like this for a while then stopped working completely

Hi, Please hit the "constant fan" button until the "on" button is removed from your Amana screen. Thank you.

bad control board

blower capacitors or motor bad

you will need to call for service. if it needs freon you cannot recharge it freon is expensive and requires a license.

The cold that you describe may be just unconditioned air? If you are certain you can hear the comp operating for a couple of minutes, and then the heat starts, I would guess it is a reversing valve issue if it's a heat pump and it probably is. Or the control board acting up. I've had a lot of issues with the boards in the Amanda PTAC units. I can't remember how to configure it, but if you Google "Amanda ptac configuration", there is a lot of info online. May try a reset method first. Hope this helps!

copy and paste https://www.amanaparts.com/Shop-For-Parts/a4b1d693274/Model-ATB2232MRW00-Amana-Refrigerator-Parts?n=3

Self evaporating simply means there is a drain pan with a heater device installed that will evaporate and condensate that drains from the unit into the pan.

You do not need the external drain pan unless the unit makes more water than the drain pan and drain pan heater can handle.

switch thermostat to emergency heat. Call for service the unit should be under warranty. Be aware that using heating strips will cause your electric to go extremely high.