Brrr, Broken Thermostat or worse?

Question

My heat is not working, and I checked all the breakers. Normally at this point, I would give up and call a HVAC guru, but one thing caught my attention. A few years back, our air-pump's compressor gave up the ghost, but even then when I put it on emergency heat, the emergency heat light turned on.

Any chance it is just the thermostat on this thing? I've been meaning to swap it out for a digital anyway.

--Rob

Rob Caskey · Accepted Answer

oh, it makes no noise when the fuse is turned off and on and it sitssilent when turned to "fan" as wellRob Caskey wrote:

Mikepier · Answer

What kind of heat you have?

buffalobill · Answer

you will want to spend $25 on a digital multimeter in the electricalsection of your hardware store. or borrow one from the neighbor andborrow him to show you how to use it.unless this is a millivolt system which requires no electricity tooperate:! if this is an electric baseboard heat 110VAC/220VAC [voltsalternating current] thermostat there is a potential shock hazard toyou inside the heating thermostat!otherwise measure the 2 wires for 24VAC when warm/satisfied/happy andzero VAC when cold/unsatisfied/unhappy temperature is in the room.if this is a 24VAC thermostat containing a surprise battery, replacethe battery or the whole thermostst.if this is a 24VAC old style two wire thermostat with a mechanicalswitch that clicks, connecting the two wires together is all that theswitch does when it wants heat.if it can call for heat by connecting those two  24VAC wires together,replace the thermostat.more reading How to Fix a Low-Voltage Thermostat at: Caskey wrote:

Rob Caskey · Answer

Thanks all. Thermastat turned out ok, but I figured I might as wellreplace it anyway. The new digital one reads "No AC Power", so time toget on the phone I suppose :(--Robbuffalobill wrote:

Rob Caskey · Answer

btw, this is a multi-stage heat-pumpRob Caskey wrote:

Tekkie® · Answer

Rob Caskey posted for all of us...Asked and answered MANY times, do your own research, call a pro.

Brrr, Broken Thermostat or worse?

Join the Discussion

Didn't find your answer?