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My totaline digital 2 stage thermostat keeps buzzing. I have to turn the whole a/c unit off to get it to stop. Lately it hasnt helped much as when I turn it back on it is still buzzing. Help

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Hi, relays will also buzz causing units to loose transformers, I have seen this in the past years also. A 2-stage heat-pump stat? I would remove the front to expose the wiring terminals and pull the hot wire red, 24 volts and that should kill the buzz. If so, the circuitry is going out and you will need a new thermostat. I would, if you have a volt meter check the incoming voltage to the stat to make sure it doesn't exceed the proper voltage rated on the cover. Max would be 30 volts ac. If its over that, the transformer is putting out to much on the secondary side and should be replaced, or it will eventually take all of the low voltage controls out. Try removing the 24 volt hot wire and also if you have a friend that has a meter or you do, check the voltage coming in to the stat. Get back to me if it exceeds the rating, as this will cause the buzzing. It may just be faulty contacts in this stat also. I wish you the best, and ask that you are kind when rating me in helping you. Please keep me posted if you need my help.
Sincerely,
Shastalaker7
A/C Heating & Refrigeration Contractor.

Posted on Jul 03, 2010

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We have bought a home with the wite rodgers thermostat 1f85-275 it doesn't seem to be working. on the top right of the screen it states 1&2 stages? anyway, help would be appriciated


Hi, this thermostat is for central heat and air systems that have more then 1 stage of heating or cooling. For example, your unit may have 2 stages of cooling, as in 2 compressors, or 1 stage of cooling and 2 stages of heating as used in commercial heat pumps. This is a multi-stage heat pump thermostat. It may be just a matter of programming the stat. If you can find a manual on it, this would help. If you open the cover, it should have directions on how to program it.Make sure you have power to everything, check all breakers to see if they may be shut of, even if you have a display, doesn't mean you have high voltage to run the unit. Make sure fan is in auto, and on heat or cool, and temperature set for it to come on. Please keep me posted.
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