Honeywell rthl-3550 L thermostat help

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Old 02-06-15, 01:41 PM
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Honeywell rthl-3550 L thermostat help

My dad tried to install a honeywell-rthl-3550
L
Aux/e
G
O/B
NOT USED
Y
R
We put Red to R
Yellow to Y
Orange to O/B
Green to G
But we have a white, brown, blue, and black wire left... Not sure where they go?
 
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Old 02-06-15, 05:28 PM
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Welcome to the forums.

I moved you to your own thread as the one you posted in was already confusing enough.

What you need to do is to post the old thermostat make and model number along with what color wires were originally connected to what terminals.

Did you also make sure the thermostat was correct for your application. You posted in the heat pump section.... do you have a heat pump ? Do you have supplemental electric heat ?
 
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