Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

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I am trying to find a solution limit 3 wire for a Amana HTM. Can you help me?

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What does 3 flashes of the red light mean on an amana model ptc153a35ac ?

Here are your Amana flash codes:
Steady On - Normal
Off Controller Failure

1 System Lockout
2 Pressure Sw stuck closed
3 Pressure SW Stuck Open
4 Open - High Limit
5 Flame sense without gas valve
6 Open rollout or open Fuse
7 low flame signal
8 Check igniter or improper ground
continuous flashing - reversed AC polarity

Sep 11, 2014 | Air Conditioners

1 Answer

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.

Feb 12, 2011 | Amana PTH153B50AM Air Conditioner

1 Answer


The limit switch will have a small button in the middle. Push to reset. If no button and limit is open. Bad switch. Replace it. Russ

Mar 25, 2010 | Amana PTC153B35AJ Air Conditioner

2 Answers

Looking for manuel reset on heater amana ptac unit heat won't come on new control board

I dont know about this model but in general electric heat wont have a reset button the heat is controled by a sequencer and each elememt has a safty limit switch incase the sequencer sticks in the on mode here is a link to where you can get more info on this model

Oct 30, 2009 | Amana PTC153B35AJ Air Conditioner

1 Answer

We have amana ptacs with electric heat that are not heating is it the control board issuse?

You could have a high limit switch that has gone out or the heating element itself has burnt out. Both the heating element and high limit switch needs to be checked by a a/c tech due to both the location and the tools needed for the checks. The high limit switch is a safety device that prevents the unit from heating too much and possibly cause a fire. The possible cause for both of these problems is a blkockage of air flow through the system ( i.e. dirty filter, debris in the condensor coils) Good Luck on your repairs hope this has helped you some


Oct 20, 2009 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

Amana inwall electric heater blows cold air

Is the blower running? Sounds like unit is tripping out on high limit safety switch.

Jan 06, 2009 | Amana Comfort Zone 12M32PBEH Air...

1 Answer

Blower is running. Inducer motor comes on then shuts off after 10 seconds. Diagnostic lights say open limit switch. Any suggestions?

Yes, look for manual resettable limits on your exchangers (where the flame goes into), or just check for continuity with meter. There is also an auxilary limit on exhanger cabinent, take those two wires off and plug in a paper clip, restart furnace, if it works replace the limit. You can do the same with the manual reset one, paper clip the two wires and bypass the limit. Don't leave this bypassed for long, it protects your furnace from fire hazard, replace asap.

Dec 06, 2008 | Amana Air Conditioners

4 Answers

Amana HTM (heat transfer module) system

I would check the house thermostat(and its wiring to the indoor unit), and if it's OK then check the heat transfer fluid diverter valve inside the indoor unit (should be sending the hot fluid through the big radiator (air exchanger)) until the surface temperature of the radiator is approximately 130 degrees F, then the fan control operates and the fan starts to blow hot air through your ductwork. My HTM is 26 years old and I've had many opportunities to "hone" its operation...

Feb 01, 2008 | Air Conditioners

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