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Question About Honeywell Thermostat TH4210D
No power to TH4210D...

I had a new heat pump and installed about 3 months ago and at that time, also had a Honeywell Digital Thermostat TH4210D installed. Came home today and house is near 100 degrees. The digital face does not light up so I assume no power to the unit. No breaker are open and everything else in the house is working. Any ideas?

Asked by John on 06/16/2009 1  Answer

ManualsOnline posted an answer 15 years, 4 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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