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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have to replace a thermostat and I bought one and have

Customer Question

I have to replace a thermostat and I bought one and have followed all directions. My old thermostat was a 24 vac Mercury TA 2000 with the wires hooked up like this
White wire -w2
Yellow wire- O
Blue wire- X
Red wire - R
Green wire - y
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

What is model on new one?

Expert:  airheatman replied 1 year ago.

Also are you sure about the green used to go to Y and Yellow to O?

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