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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22517
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Using a Honeywell RTH6350 to change out an American

Customer Question

Hey using a Honeywell RTH6350 to change out an American standard
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: ATSTAT655
JA: Huh?
Customer: The Honeywell only takes 4 wires and I have 8
JA: Do you plan on doing the work yourself?
Customer: was going to have done before without problem at other house
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.
Submitted: 1 year ago.
Category: HVAC
Customer: replied 1 year ago.
Sorry got pulled away
So got the Honeywell to replace the Amer Std but Amer Std had 8 wires Honeywell doesn't have slot for Blue black Tan and Orange Any thoughts?
Expert:  BillyHvac replied 1 year ago.


My name is Billy.

Do you have a gas furnace with ac or do you have a heat pump?

Customer: replied 1 year ago.
I believe it is gas furnace how would I tell?
The old unit controlled both heat and cool with swtitch depending on which was operating
Expert:  BillyHvac replied 1 year ago.

If you had a would have gas pipe to it and a chimney pipe or vent.

A heat pump is simply an ac package that runs all you would have is the outdoor unit running in summer and winter ....

Customer: replied 1 year ago.
Must be a heat pump then as there is no other unit just an upstairs ac and downstairs ac
Expert:  BillyHvac replied 1 year ago.

do you have more than 1 thermostat

Customer: replied 1 year ago.
upstairs which I am changing out the thermostat and downstairs which was already changed out from original amer std thermostat
definitely a heat pump looked at inspector's report
Expert:  BillyHvac replied 1 year ago.

ok this is the important part...

do your thermostats wire to a zone board first and then the blower unit?

Do you have 1 indoor blower and 1 outdoor unit?

Customer: replied 1 year ago.
Inspection report says 2 heat systems
not sure about zone board how would I identify?
Expert:  BillyHvac replied 1 year ago.

if you have one or 2 outdoor units

Customer: replied 1 year ago.
2 outdoor units
Expert:  BillyHvac replied 1 year ago.

Ok, the existing thermostat is for a heat pump with electric back up heat. The new thermostat you have does not have the provisions for a direct changeover. You would need a thermostat that says heat pump compatible with back up emergency heat

Customer: replied 1 year ago.
OK makes sense so back to Home Depot and ask for the correct one and then likely not an issue?
Expert:  BillyHvac replied 1 year ago.

Correct....make sure the emergency heat provision is available...just not auxiliary.


Customer: replied 1 year ago.
Expert:  BillyHvac replied 1 year ago.

If all set just rate service to close question