Heating, Air Conditioning, Fridge, HVAC/Thermal switch on Trane XE70


I have a Trane XE70 furnace in my house.  It's ~25 years old which the model # probably tells you.  My problem is the furnace will only stay on for a short time (~5 minutes) even though the setpoint temperature is far from being reached.  There's a thermal switch at the top of the unit,  kinda all by itself that is opening too soon, shutting off the unit.  The box that it's monitoring is barely warm to the touch so I think it's opening pre-maturely.  There are no markings on the switch.  I've jumpered out the switch and it stays on until the s/p is reached so the switch is the problem.  My problem is I can't find a schematic to show me the p/n for the replacement.  Any ideas??

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Eric & Ann Campion

Heating, Air Conditioning, Fridge, HVAC

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Eric Campion


We have been repairing appliances for over 36 years and have owned our own business for the same. We can help in any or almost all complaints or at least give you some intelligent input to help you make rational decisions. If maxed-out... You may visit our website at http://www.affordableappliance.com for quicker service.


30 years owning our business and repairing Major Home Appliances

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36 Years of Working on Major Home Appliances and selling parts. Our office staff is top notched and is supervised by My Wife Ann who is also very experienced in the Major Home Appliance Service and Part Sales Business

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