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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22012
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Removed a honeywell thermostat TH3210D but did not label the

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Removed a honeywell thermostat TH3210D but did not label the wires. I have 6 wires; Green, Red, White, Yellow, Blue, Orange. Could use a little help here

I can tell you where they were supposed go...but some folks dont follow the color code when installing.

Should have been:

red to r
blue to c
orange to o
green to g
white to aux
yellow to y

Keep in mind that is how it is supposed to be.


Customer: replied 3 years ago.

the connections on the thermostat are as follows for conventional; Y2, W2, G, W Y, R and RC. For heat pump; L, AUX, G, O/B, Y, R and RC

I assume you have a heat pump if you used all 6.

L= empty
Aux= white
O/B = orange
Y= yellow
R and Rc= red
G= green

If no C terminal tape off blue and tuck away.

Make sure to set for heat pump in menu


Customer: replied 3 years ago.

THe old thermostat had a "C" connector but was not used and it says it is optional with batteries, new one has no "C" connector but uses batteries

Thank you,

Then is it possible the blue wire was not used previously?


Customer: replied 3 years ago.

At this point anything is possible, LOL. Didnt pay too much attention, just started taking it apart.


well blue is the primary wire for C.

In this case wire as instructed omitting blue. If you have any operational issues just return back here for follow up.


Customer: replied 3 years ago.

I have a jumper btw the r and rc, does it matter which one I put the red wire into. I am assuming I leave the jumper in and power either side by inserting the red wire

correct. either one gets the red supply as long as jumper in place


Customer: replied 3 years ago.

Unit turns on but is blowing warm air.. Outside unit is also on. The air coming out of the vents smells like when you first turn on the heat after not using it all summer

Did you program for heat pump?

What is brand name of outdoor unit?


Customer: replied 3 years ago.

Carrier inoor and out and how the heck do I program for heat pump? Thermostat says "cool on"

Do you know how to get into menu function to set for heat pump?

Customer: replied 3 years ago.

Got it figured out, after calling Honeywell and speaking to someone in India

does it work now?

Customer: replied 3 years ago.

Seems to be cooling, it has gone from 84 to 82 inside in about 15 minutes or so. Dam A/C guys came out the other day and wanted to charge me almost 700 to clean the evap coils. Same group I have been fighting with since 2006 because when I turn on my oven the house gets up to over 80 degrees and the a/c cant keep up

Wow, sounds like you have been through the wringer.

Hope things work out for you now.

If you have a issue just let me know.


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