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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8048
Experience:  Furnace, A/C and heat pump specialist.
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Thermostat display will not come on. Breaker is fine.

Customer Question

Thermostat display will not come on. Breaker is fine.
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.
Hello. My name is ***** ***** I'll do my best to help. Let's get started and see what we can do.Do you have a multi meter for troubleshooting? And has any work been done such as replacing thermostat?
Customer: replied 1 year ago.
the thermostat is 13 years old . I was just wondering where the fuse is .
Expert:  airheatman replied 1 year ago.
Can you provide model on thermostat and the indoor air handler?
Customer: replied 1 year ago.
trane 340.
Expert:  airheatman replied 1 year ago.
O I believe the fuse the owners manual is referring to that may be blown will be in the air handler. what is model on air handler so I can tell you where to look for the fuse? It will probably be a small auto type fuse.
Customer: replied 1 year ago.
it's up in the attic . I can't get to it right now . I'm in a dental office .
Expert:  airheatman replied 1 year ago.
OK. You will most likely have to get in the air handler to replace the fuse.The transformer in the air handler is what powers the thermostat.There is normally a fuse on a control board or somewhere in the air handler, If you would like to come back to question when it is convenient to access air handler is fine.

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