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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8327
Experience:  Furnace, A/C and heat pump specialist.
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I am replacing an old thermostat with a new programmable

Customer Question

I am replacing an old thermostat with a new programmable Honeywell. My problems are: one the yellow wire is connect to the Y but the other end is permanetly attached to the back of the old thermostat, Not coming out of wall. A blue wire is also attached to Y. Second, there is a wire that goes from RC to RH what do I do with that?
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: To the Thermostat
JA: Do you plan on doing the work yourself?
Customer: I am right now
JA: Anything else we should know to help you best?
Customer: No
Submitted: 9 months ago.
Category: HVAC
Expert:  airheatman replied 9 months ago.

1. The wire that is permanently attached should not connect to one of your thermostat wires.

All wires from wall should connect to terminals

2.Put your red to RC and leave jumper from RC to RH