Recent content by Bob2701

I gave up on this Google Nest Thermostat. (Mirrored face) I took the board out and traced to the other side of the 24vac transformer and soldered a jumper to it. I sent this up to the thermostat and had 24vac between R & C but the thermostat changed it's error from N260 to N261. Both meaning...

This is basically what I have with the 24vac transformer, my problem is that I'm unsure where to connect both wires at the thermostat. It looks like I should be able to just piggyback on the R and the other wire to the C but I would like to be sure as to not damage the thermostat or zone control.

@fitter30 I took a measurement as you asked but only read about 3-4vac. From the metal housing I got 37vac but I'm thinking that is from the 120ac rather than the transformer. I checked the splice I mentioned and the 24vac from that transformer was feeding the clock on another old thermostat. I...

OK, thanks I'll give that a try tomorrow. So since at the panel they are both marked T-T if I get the 24vac that one would be the R? I found a splice where the tech tied into so I just have to determine which side to use. The one circled is from the transformer ans the white wire is from the...

Looking to install a Google Nest thermostat and it says I need a power source. I have an older SR 506 from Sweet Controls in CT and there is no connections for a C wire, only T-T for each thermostat. Is there any way to get a C wire on this panel? TIA, Bob