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Question

I have a old 1972 flame master furnace that does not have a manual switch to turn on the fan. I would like to put in a newer thermostat with a switch to control the fan. There currently is 2 wires from the furnace to the thermostat and the newer thermostat requires three. where on the furnace would I connect the third wire to ,to allow me seperate control of the fan.

Submitted: 328 days and 10 hours ago.
Category: HVAC
Value: $15
Status: CLOSED

Accepted Answer

Does the furnace have a G terminal on the strp along with the R W Y C terminals if it does you need to run a wire from the g terminal on the thermostat to the g terminal on the furnace

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Expert: hvacmrfixit
Pos. Feedback: 100.0 %
Accepts: 
Answered: 12/29/2008

HVAC Technician

30 years of commercial and residential heating and cooling installations and troubleshooting

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