Saturday 30 January 2021

Trane Heat pump lockout every time it is below freezing

I have a Trane XR Heat Pump dated 8/2015, model number 4TWR4060E1000BA.

I like to sleep with it cool. At night I turn down the thermostat.

So when I get up I turn up the thermostat. This year if it is below freezing, especially in the 20s, the heat pump locks out. 5 flashes of the Red LED. I can reset the power and then it will normally run all day, until the next time. However the last few days (its been colder) it seems I have to reset it more than once.

I have replaced the capacitor (twice). The defrost control board. The temperature sensor. And the thermostat with a new Honeywell RTH9585WF.

When it is running, it seems perfect. I can hear the compressor but it is quiet and strong sounding, no extra noises. The heat feels perfect in the house. I always have heat because of the AUX heat will come on if the heat pump is in lockout.

I sure would appreciate any ideas.

Thank you ahead of time.


source https://hvac-talk.com/vbb/showthread.php?2226184-Trane-Heat-pump-lockout-every-time-it-is-below-freezing&goto=newpost

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