If right after I go up to 72 and the heater turns on and I go back down to 67 for example it will turn off.ĭo these units have a high limit thermostat somewhere inside, that might be broken? Can a high limit thermostat just be kind of broken, sometimes work and sometimes not?Īgain thank you very much for your help. After heater turns on and I go to bed the unit fan and heater stays on, does not turn off anymore and the room gets very hot much more than 72, it keeps heating. I go up to 72 on control board, I can hear a click and the heater turns on. I check the thermistor temperature, it is about 69. I turn the unit on, set it on HEAT 70, the fan starts, heater not yet. I have tested the inside thermistor and is also not close to 90 when the heater turns off. 374 dollars this December it stopped working again, The fan rocks back & forth but does not spin, I read in one of the forums that the programming could be corrupted. After a few minutes the heater starts again for a while and stops again, it keeps doing that, the room stays cold. I have a Trane air handler in the attic Model TWE040E13FA1 The blower stopped working December 2013, Bought the blower module very expensive. After a few minutes the heater turns of, but the inside fan keeps turning and normal/cold (not heated air) comes out.

It starts heating, the inside fan turns, the unit is set on 90. Dyno Tune PRICING GM Factory PCM Tuning Additional pricing and licensing may be required based on your modifications, please contact us with any questions. I have tested the inside thermistor and is not close to 90. We come to you with onsite service Skilled technicians with factory. It starts heating, when I turn it on, but suddenly stops heating and the fan turns off, the display still shows 90 and is on HEAT, but the unit it self is not doing anything until it turn it off and back on. I have notice on PTAC Amana the inside fan is kind of slow, but on this unit it is very slow. I appreciate all the help I can get of just one, two or all of them I have 3 PTAC units model (2 x PTH123E35AXXXAB and 1 x PTH123C35AMCA), with heating issues.

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