troubleshooting honeywell chronotherm IV plus. My thermostat seems to run regalrdsless of temperature settings. It is 10 1/2 years old and has been running fine until this year. It either runs endlessly cold when on air conditioner setting, or fries us endlessly with hot air when it's set to heat. I don't think the thermostat registers anymore.

Asked by Lori on 01/03/2015 1  Answer

ManualsOnline posted an answer 9 years, 3 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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