Trane XV80 System Totally Stopped Working


  #1  
Old 11-25-16, 05:59 AM
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Trane XV80 System Totally Stopped Working

It was hot in our house yesterday with all the cooking so I switched our system over to A/C. Everything worked fine. After it cooled down last night I switched back to heat and went to bed. When I got up this morning the thermostat was set to 70/Heat and the room temperature was 67. I switched back to A/C and set temp. to 60. Nothing happened. I can hear a couple of clicks on the thermostat but that's all. I set the fan to ON but nothing happens.

The PC board shows a red LED blinking continuously about once every second. If I'm reading this code correctly it means normal call for heat.

Any suggestions would be much appreciated.

Trane Model 4TCC043BCHCCA
 
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Old 11-25-16, 06:45 AM
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Not sure if it matters but yellow and green LED's are not lit.
 
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Old 11-25-16, 06:54 AM
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Do you have any condensate overflow safety switches? A meter would also show if you were getting a call for operation at the unit from the thermostat.
In the code schematic what does it state for a flashing red light?
 
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Old 11-25-16, 07:48 AM
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Both slow and fast flashing red = Normal call for heat.

Where would I find a condensate overflow safety switch?

I swapped out a working thermostat with same results.

Thanks for the reply.
 
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Old 11-25-16, 08:27 AM
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Do you have a meter and know how to use it?
 
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Old 11-25-16, 08:39 AM
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Yes & yes but not needed.
In my original post I mentioned running A/C yesterday. You mentioned condensate overflow. I checked the pump reservoir and it was full. The pump plug has come part way out of the socket. Plugged the pump in, reservoir emptied and furnace came on. A nice, toasty 70 degrees now. SWEET.

Thanks so much for the help. You're the bomb and nice call.
Hope you have a great weekend.
 
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Old 11-25-16, 01:44 PM
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Four gold stars for roughneck!

****!
 
 

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