Heat pump with back up heat strips


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Old 01-16-23, 12:31 PM
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Heat pump with back up heat strips


New t5 Honeywell thermostat connections minus the U connections

Current thermostat connections
Will the t5 Honeywell thermostat work on my unit ?
 
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Old 01-16-23, 02:40 PM
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Welcome to the forums.

Almost any stat will work here. The T5 will too.

It appears you have a heat pump with back up electric strips. That means you use the heat pump labeling which also means that pink jumper is in the wrong place and doing nothing.

R ---------------> red --------------> R (keep slider in one R position)
Y ---------------> yellow ----------> Y
C ---------------> blue -------------> C
O/B ------------> orange ---------> O/B
G ----------------> green ---------> G
AUX ------------> white ----------> AUX/W2

Program the new stat for heat pump operation with back up heat/aux heat.



 
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Old 01-16-23, 03:01 PM
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Wonder what that pink wire that they cut the jumper from goes to ?
 
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Old 01-16-23, 03:04 PM
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That pink jumper should have gone from AUX to E..... looking at the correct labeling below the terminals. This jumper would have allowed just the electric heat to run when in E (emergency) mode.

They just used the piece of pink wire as a jumper.
The wire that was cut off from the cable is a pink spare wire.

L is light.... as in warning or trouble light.
 
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Old 01-24-23, 09:10 PM
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There is a company here in Houston that wires that way regularly.
I figured it was so the homeowner could see when the expensive heat strips kick in.

I always wire as PJ has posted.
 
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Old 01-24-23, 09:16 PM
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Interesting idea.
 
 

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