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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My old thermostat has no c terminal or wire

Customer Question

my old thermostat has no c terminal or wire
Submitted: 10 months ago.
Category: HVAC
Expert:  airheatman replied 10 months ago.

There are a couple of solutions for this.

Expert:  airheatman replied 10 months ago.

How many wires do you currently have?

Customer: replied 10 months ago.
4
Customer: replied 10 months ago.
4 wires
Expert:  airheatman replied 10 months ago.

The options are as follows:

1.Run an extra wire

2.Sacrifice the FAN ON function of just being able to circulate air without heat or ac

3. Add an adapter in furnace that costs about 30 bucks.

Which of those sounds best to you?

Customer: replied 10 months ago.
none
Expert:  airheatman replied 10 months ago.

Those are the only options except to get a thermostat that does not requires a C wire.

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