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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22514
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I am installing a new honeywell rth6350 on a single zone

Customer Question

I am installing a new honeywell rth6350 on a single zone heatpump with auxilliary heat and have a wiring question
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: Yes, the old thermostat's buttons no lnger function so I cannot adjust the temperature
JA: Do you plan on doing the work yourself?
Customer: I have already installed the thermostat but have a wuestion about the color coding
JA: Anything else we should know to help you best?
Customer: No, I just have a question about the wiring
Submitted: 8 months ago.
Category: HVAC
Expert:  BillyHvac replied 8 months ago.


My name is Billy. What is your question?

Customer: replied 8 months ago.
I have a 6 wire system that was connected to old carrier tstat as follows:
Y to Y/Y2
W to W/W1
G to G
R to R
O to O/W2
B to CMy new RTH 6350 tried to explain, but not weel enogh for me. I have new tstat wired as follows:G to G
Y to Y
R to R/RC (with jumper)
B taped off
O to O/B
That left me with a White wire that shares same terminal as O/B so I connected to AUX?
Expert:  BillyHvac replied 8 months ago.

That is correct. White to aux..then program in menu for heat pump.

Customer: replied 8 months ago.
Awesome. Wanted to make sure I didn't wire for eheat to run all the time. So Orange is for heat valve and w is for eheat now.
Expert:  BillyHvac replied 8 months ago.


The O wire is what determines the heat/cool.

Y turns on the compressor

G the fan

R is power

W is aux heat after heat pump cannot keep up.


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