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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Zero experience with AC here. Today I replaced my thermostat

Customer Question

Hey Everyone!
Zero experience with AC here. Today I replaced my thermostat and I needed the help of customer support because it looks like my setup is a little different then the typical install. We got it working (as far as I know) but I'd really like a little more clarity on how it was accomplished and if it's actually setup safe and properly.
The AC is a heatpump
Previous Thermostat
Ritetemp 8022C
With a wire configuration of the following:
RH/RC (Jumper Wire)
Y/W (Jumper Wire)
*Note: There were also 4 other wires not connected to anything on the RiteTemp
New Thermostat
Sensi Wi-Fi
With a wire configuration of the following:
RH (The Sensi has a jumper wire built into it for RC)
W/E (This was previously the B wire)
C (I was told just to use any of the extra wires not being used)
When I first installed the thermostat I had the B wire connected to the O/B on the Sensi. This had hot air blowing when in cooling mode and cool air blowing when in heat mode. We switched the O/B wire to W/E and that seems to fix the issue. Again, I have zero knowledge and I'm just trying to understand what took place. Thanks in advance!
Submitted: 4 months ago.
Category: HVAC
Expert:  BillyHvac replied 4 months ago.


first of all....the C wire...did you hook at C in the air handler also?

Customer: replied 4 months ago.
That would have been too simple. Living in a condominium complex and I'm actually not sure how the place is wired. I was told just to use one of the "extra" wires as a C wire. Sounded a bit interesting to me and that's why I'm reaching out. Thanks!
Expert:  BillyHvac replied 4 months ago.

ok, do you know if the outdoor unit is a Rheem or Ruud?

Customer: replied 4 months ago.
No sorry. I'm aware of what the unit is and never received paper work on it.
Expert:  BillyHvac replied 4 months ago.


first...we have to get into the blower unit to "make a c wire".

Are you able to get inside the indoor unit where thermostat wires attach?

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