How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask M Oglesby Your Own Question
M Oglesby
M Oglesby, HVAC Technician
Category: HVAC
Satisfied Customers: 2038
Experience:  Universally Certified HVACR Technician
27079509
Type Your HVAC Question Here...
M Oglesby is online now
A new question is answered every 9 seconds

Furnace American Standard Freedom 80 2 stage. New Thermostat

This answer was rated:

Furnace: American Standard Freedom 80 2 stage.
New Thermostat: Hunter model 40170.
problem: four wires from furnace R, W, G, W2 were hooked to old thermostat with same terminal labels. RH & RC jumpered on the old and thermostats. I hooked R, W, G up. But new thermostat does not have a W2. Remaining terminals on the new thermostat are B, O, Y. What do I do with the blue wire comming from the furnace W2? Do I need a different thermostat?

M Oglesby :

Is this heat only or a/c and heat?

JACUSTOMER-vpn7gogc- :

heat only. when lighting off for the winter season, furnace wiould not shut off. so I'm replacing the thermostat.

JACUSTOMER-vpn7gogc- :

the old t-stat was digital. the new one is electromechanical. easier to use (I hoped)

M Oglesby :

Try hooking the W2 wire to the B terminal.

JACUSTOMER-vpn7gogc- :

B terminal is what function?

M Oglesby :

It should be for the second stage heat or Aux. Please hit ACCEPT if this answers your issue.

M Oglesby and other HVAC Specialists are ready to help you