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unknownling
Community Member
since ‎09-28-2021
‎11-05-2021

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  • 6 Posts
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User Activity

Unstable voltage between W1 and RH

11-05-2021
The old thermostat uses only W1 and RH for heating only. After replacing it with Nest learning thermostat connecting only W1 and RH, it's acting weird. I measured the voltage between the W1 and RH, before install nest, the voltage is stable around 25...

Nest learning thermostat connects to an oil boiler with Carlin ProX 70200 burner

11-04-2021
Nest learning thermostat replaced the original old thermostat that controls the oil boiler for heating only. Only two wires used: W1 and RH. Pretty straightforward. And it did bring up the oil boiler and burner successfully after install, if I set th...

Yellow wire originally connects to Y/Y2 in Honeywell and Y1 is empty. Connect to Y1 or Y2 in Nest?

09-28-2021
I'm replacing the Honeywell thermostats with Nest. The yellow wire is originally connected to Y/Y2 in Honeywell, Y1 is empty. I tried to connect it to Y2, but got an error during setup. I didn't try to ignore it, instead I wired it back to Y1, but I ...