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Amana PTAC PTH093E Fan runs at single speed only regardless of setting-auto/low/high Hot or cool air is coming out so compressor/heat coil is working. Reset unit and replaced fan motor-no change.

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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!

Posted on Mar 13, 2017

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Posted on Jan 02, 2017

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1 Answer

Ac works fine when fan is on low but fan cuts off after a couple of minutes on high


Bad fan motor. Multi-speed motors have a set of windings for each speed. Your high speed is bad so the only solution is to replace the complete motor. When motors are going bad they will over heat and kick out on the heat safety. As it cools back down it will start again for a short time again until it gets hot again.

Jul 12, 2015 | Coleman Dometic Duotherm Rv Air...

1 Answer

Amana ptac during heat mode will blow hot air , then blow cold , but will cycle back to heat eventually is this Normal?


if the fan switch is in the Run position and not the auto position you are getting cool are when the heat element is not on. this is kind of like a way to circulate the air. look for an auto setting it then should only come on when needed. Keep in mind it is normal for the fan to start blowing before the heating element is warmed up, this prevents it from over heating, or coming on when the fan is not working

Nov 26, 2014 | Heating & Cooling

1 Answer

When I turn the furnace on the ac comes on also.


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If you have both heat and ac running that means that the Yellow , AC and the White heat circuits are both being energized with the Red 24 volt hot leg that enters the tstat on the R terminal, note the Auto fan switch between Yellow and Green if Normally closed that is the Auto setting and high speed fan comes on for the Cool mode via the fan relay,
while the Heat speed is low speed and controlled not by the fan relay but the temperature or time delay, you need to determine what speed you have running now, low or high? if you flip the fan switch to ON and it speeds up then it was on low, if it makes no difference you have high sped running already.

Oct 06, 2013 | Dometic Rooftop RV Air Conditioner

1 Answer

Amana PTAC will cool but fan will not go up in speed


Change the thermostat wire , if not change your board.

Jun 02, 2012 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

The ptac unit is not heating or cooling the aux heat works the line out of the compressor gets hot but the line going to the coils up front does not get real hot just warm and does the same thing on the...


Verify all your components are operating - Compressor? Condenser fan motor? Blower fan motor?
If not check voltage to any that are not operating.
If all components are operating and the coils are clean - the refrigerant level is most likely low.

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1 Answer

High low fan motor


Your main concern is the temperature difference across the indoor coil for both heating and cooling. When you turn your thermostat from auto to on, you are on high speed.

If you have long duct runs and little return air registers then high speed
would help cool the house better. However in the heating mode, you
could lose up to 10degrees by having the high speed setting.

What they installed is sized for your house and the speeds should not have to be changed unless the ductwork is not sized right for the house.
Cooling should be High-Black wire.
Heating should be Low-Red Wire.

400cfm equals a ton of cooling= 1200 sq. foot, For cooling you need
High speed. For heating it is whatever the temperature rise across the
coil is, which is located on the furnace/air handler.

Jul 13, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

I have thru-wall PTAC Amana PTH093B35AM unit. I


see if you can find a new board the power failure fried it

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1 Answer

Amana PTAC ''Auto'' setting doesn't work. I turned on ''Heat'' and then ''Cool''. I can get the ''Low'' and ''High'' settings but not the ''Auto'' Please help


sounds like ur board is gone out and needs replacing if u dont no about these units i dont advise trying to do this trust me save urself some money and headach and call a tech

Feb 23, 2010 | Amana PTC093B50AJ Electric Heat Air...

3 Answers

Ptac fan keeps blowing


Try setting the fan control to "AUTO" this will cause it to cut out with the compressor.

May 02, 2007 | Amana PTH123B25AJ Heat Pump Air...

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