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t stat wiring problem

3404 Views 4 Replies 4 Participants Last post by  Tinman_iii
My furnace (gas) has C G Y W R
for controls.

Stat itself (digital) has Y RC RH (jumper in place on rh an rc) W G C H2 H1

what I would like to do is use the "cool" function of the thermostat to strictly start the blower. I have no "cooling" in place, I just would like to run the blower on the t-stats "cool" cycle to help circulate the air.


any input?

thanks in advance.

Tin
1 - 1 of 5 Posts
My furnace (gas) has C G Y W R
for controls.

Stat itself (digital) has Y RC RH (jumper in place on rh an rc) W G C H2 H1

what I would like to do is use the "cool" function of the thermostat to strictly start the blower. I have no "cooling" in place, I just would like to run the blower on the t-stats "cool" cycle to help circulate the air.

another question, on the furnace circuit board, what two control leads do I "jump" to start the blower?

any input?

thanks in advance.

Tin
If I'm understanding you correctly, you shouldn't have to do anything. On any call, cool or heat, the thermostat should put 24 volts on the G wire, this is the wire to the furnace that turns on the fan.

Just hook your 5 wires to the same terminals on the new thermostat. R goes to both RC and RH on the stat.

Jumping R and G at the furnace should turn on the fan.
1 - 1 of 5 Posts
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