[sdtsdt]

hello ... I have an Trane XE60 ... Can't get it to heat ... The pilot light stays lit ... I switch the thermostat to heat ... the burners ignite BUT when I think it is going to turn on the blower, the large flames goes out ... The pilot light stays lit but the burners go out ... If I switch the thermostat fan from Auto to On then the burners re-ignite ... But as soon as I turn the fan back to auto the burners go out ... I replaced the original thermostat when the unit first failed because the display would go dark when the issue occurred ... the original thermostat did not use batteries ... I installed a different thermostat, 4 wire hook-up ... R W G Y ... The thermostat had a jumper for fot RH and RC ... I did not remove it ... I did not try the switching the fan to On until after the thermostat switch ... Any advice would be great ... I do not see a flame sensor so I am currently stuck ...

 

[roughneck]

What’s the full model number?
There’s no need to start swapping parts. Let’s use your meter to troubleshoot.

 

[sdtsdt]

the model number us: TUP120A960A1

Thank