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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 have cable connection W is -Y is -RH is

Customer Question

Hi my old thermostat have cable connection W is white-Y is white-RH is red and
G is green ok.
The new thermostat is connection show G is white Y is black W is black and
R is black also have a jumper in R and RC.
My question is correct connection betwen old an new thermostat.
Tankyou very much for your answer.
R.Rojas
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Can you give me model on both thermostats?

Customer: replied 1 year ago.
I do not have the model number for old one . The new is Heat/Cool RTH111B
Expert:  airheatman replied 1 year ago.

OK If you had this

White to W

Another white to Y

Red to Rh

Green to G

you will as follows:

White that went to W will go to W

Other white that went to Y will go to Y

Red that went to RH will go to R and leave factory jumper to RC

Green that went to G will go to G.

Expert:  airheatman replied 1 year ago.

Not sure what you are referring to about the new thermostat is connection show G is white Y is black W is black and R is black also have a jumper in R and RC