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My Honeywell RTH2300/RTH221 isn't responding as instsalled.

Customer Question
My Honeywell RTH2300/RTH221 isn't...

My Honeywell RTH2300/RTH221 isn't responding as instsalled . Air conditioner isn't activating.

Contractor's Assistant: Did you double-check the thermostat's settings? And what about the filters?

Yes, and filters are great. I had four wires coming out of the wall, two are red and two white. Now, someone else actually installed it, but with only four wires how complicated can it be?

Contractor's Assistant: Do you plan on doing the work yourself?

Yes, I did try to re-due the work following the instructions, to no avail, so lets get going.

Submitted: 11 months ago.Category: HVAC
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Answered in 24 minutes by:
9/22/2017
HVAC Technician: Phil, Mechanical Engineer replied 11 months ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 7,426
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, it can get very complicated, here is why the usual 24volt thermostat uses red, white, yellow and green wires, without that color separation there is no way to tell which of the reds is 24volt power and which of the whites is heating.

Its also possible that you have a 120 volt line voltage control system... and you purchased that rth2300 which is only for 24volts

click here to see the need for different wire colors

we can sort this out easily if you can send me a photo of the back side of the old thermostat where the 4 wires connected. along with the brand and model numbers on the back of it.

.

Use the 'add files' link next to your send button to get that photo to me, we can go from there without a time limit

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