[jrobins1]

Our furnace is not working. When we switch the thermostat to blower on it will blow air, but when set to auto it doesnt work. Went and took cover off and there is a red light that stays on? The furnace doesnt seem to ignite?

 

[NiNe O]

Test voltage between w and c during call for heat.

 

[jrobins1]

What voltage should it be.... and am Im looking at thermostat?

 

[jrobins1]

And thank you for replying!!!!

 

[NiNe O]

Should be 24v @ control board.

 

[jrobins1]

ok, tested the wires in the thermostat and the furnace kicked on. But when it did, the red light blink 3 times and then 2 slow times. It never did engage the gas to come on. I dont know if we didnt do this long enough for it to kick on? Do you think it could be the thermostat

 

[JJboy]

On the control board jumper R-w.....furnace should work. If not, your problem is at furnace.

Sent from my iPhone using DIY Forum

 

[jrobins1]

And the control board is located in the furnace? Sorry for sounding so stupid....

 

[jrobins1]

Is the control board the thermostat upstairs on the wall?