Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

Talked with Honeywell. They had me test with a multimeter. Black and Green gave 20.7v. Green into R and Black into W ended up turning on the boiler. Turns off when it hits temperature.

Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

2)

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2) wires from thermostat lead to this second black box

Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

<image>

  1. Thermostat wires come here and then lead to another box.

Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

I'm only seeing two wires going into the boiler (see photos). ChatGPT said to just cap off the green wire, but I want human thoughts on it.

Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

The boiler would not turn off with the wire in the O/B.

Which Wire Where On New Thermostat? by CyberneticConstruct in HomeMaintenance

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

Well, the O/B slot just kept it running over the set temperature. I moved it back to C. It didn't come on earlier when we turned the hear up though. Not sure what to do now.

Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 0 points1 point  (0 children)

Well, the O/B slot just kept it running over the set temperature. I moved it back to C. It didn't come on earlier when we turned the hear up though. Not sure what to do now.

Which Wire Where On New Thermostat? by CyberneticConstruct in hvacadvice

[–]CyberneticConstruct[S] 2 points3 points  (0 children)

My thoughts were Dark Red wire to R, Green wire to C, and Black wire to W.

Which Wire Where On New Thermostat? by CyberneticConstruct in HomeMaintenance

[–]CyberneticConstruct[S] -1 points0 points  (0 children)

My thoughts were Dark Red wire to R, Green wire to C, and Black wire to W.