All wires match up except the RED wire (previously connected to "R") and the blue wire (previously connected to "C") on an manual white-rodgers thermostat (type 1f58w-58 2 stage heat/cool). On the programmable white-rodgers thermostat (type 1f78-151 single stage) I only have one open terminal and it is "B", but 2 wires (blue and red)w/o a clearly defined terminal. Does the blue wire go to the "B" terminal? Does the red one go anywhere, since there is a red jumper wire connecting "RC and RH"?

Test Passed
Fan turns on
A/C tuned on
Heat Failed


Help please...

All wires match up except the RED wire (previously connected to "R") and the blue wire (previously connected to "C") on an manual white-rodgers thermostat (type 1f58w-58 2 stage heat/cool). On the programmable white-rodgers thermostat (type 1f78-151 single stage) I only have one open terminal and it is "B", but 2 wires (blue and red)w/o a clearly defined terminal. Does the blue wire go to the "B" terminal? Does the red one go anywhere, since there is a red jumper wire connecting "RC and RH"?

Test Passed
Fan turns on
A/C tuned on
Heat Failed


Help please...

Hope this helps. https://www.askmehelpdesk.com/heating-air-conditioning/heating-cooling-maintenance-repair-troubleshooting-frequently-asked-questions-58313.html#post268211

Hope this helps. https://www.askmehelpdesk.com/heating-air-conditioning/heating-cooling-maintenance-repair-troubleshooting-frequently-asked-questions-58313.html#post268211