Converting old thermostat to new digital honeywell

wmproop · Jan 11, 2012, 05:29 AM

are you saying after installing red to rh and white to w its not working? did you turn off the breaker to furnace before attempting the change out?if not you may have blown your transformer,,it sometimes only takes a very small spark to do the damage.

superj2112 · Jan 12, 2012, 09:54 AM

I didn't notice a spark where is the transformer located and how do i know if it is fried

mygirlsdad77 · Jan 12, 2012, 04:11 PM

You may have a fuse on the control board, or inline on the low voltage side of the transformer. Check there first. Your transformer will be located in the furance, so will the controll board if your unit has one.

ballengerb1 · Jan 12, 2012, 05:52 PM

Please tell us what type of furnace or boiler you have and then the exact stat you are installing. They are not all interchangeable.

Seann · Jan 13, 2012, 10:12 AM

hi

that stat need 20Vac-30Vac to work
need to check the voltage between the wires
if the voltage is less than 20Vac or if there is no voltage need to work with a professional
the wiring is correct,it should be in Rh and W.

Converting old thermostat to new digital honeywell

Add your answer here.

Check out some similar questions!