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My honeywell thermostat will not cut on. I have tried reseting all the breakers and still nothing. Please help!

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If you have no power either the batteries have died or the transformer in the air handler or furnace has died....

Check for 24v AC power at the t-stat and then check to see if it has batteries...


Posted on Aug 23, 2010


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there could be alot of things going on is this gas or electric heat first off? do you have a heat pump system does the outside unit normally run during the winter if so then probley a heat pump...
does the fan come on when you put the thermostat in "fan" position if so ok we got power still to unit... try resetting the breaker first to the heater at electric panel the one marked heat or furnace if not marked go to indoor unit see if it has a plug or breaker on it reset there. try operation again watch it and see what it does if a gas unit there is a series of operation whee does it fail most gas units have a fault light inside you can look at and will help...if electric go back after resetting and try again if nothing remove cover to thermostat do you have good batteries in it if so the take a small wire and jump the terminals "r" and "w" ehich is power adn heat see if it works that way... if nothing then you got an issue with the indoor unit most likely and will need more explanation if it does work then thermostat is either programmed wrong or faulty.. make sure you have it set on hold rather that program... repost if you need more help

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