30 yr old System - http://www.hvacmechanic.com/ Forums


Original message

Mackker

24.57.147.89

"30 yr old System" , posted Mon 21 Jun 19:41user profileedit/delete messagepost reply

We have an old green carrier heating/AC system, with the old round honeywell thermostat. The wires are Black, Red, Green and Creamy Beige. Since i have a 4 wire system, my new Hunter Digital thermo #47350 says not to use common wire, what wire is common?? Since it has batteries,(jump RH & RC) Thermo has 5 terminals "RH, RC, Y, W, G" Where do the Red,Black,Green,Beige wires plug into??

Thanks

 


Replies:

cesarin78801

67.136.139.38

"Re(1):30 yr old System" , posted Mon 21 Jun 22:17user profileedit/delete messagepost reply

I agree with Mr. Doc

 

HVAC Doc

64.123.113.178

"Re(1):30 yr old System" , posted Mon 21 Jun 21:31user profileedit/delete messagepost reply

You will need to look in your airhandler/furnace and see what color wire is connected to which terminal. That old of wiring there is no telling what is hooked where.