New answers tagged

0 votes

C-Wire for a Vulcan Gas Central Heater for Nest Thermostat-E

I too own a similar VULCAN ducted heater, and was thinking about fitting a nest (or ecobee) thermostat, here in Australia. I realize this is an old thread but I'll share my insight. Firstly, I'll ...
user avatar
  • 31
1 vote

C Wire for Weil-McLain Ultra 105 series 2 location?

Got it solved by accident lol. When I went to turn off the ac at the breaker totally forgot about the air handler in the attic. Blue wire and white wire for the ac was just shoved in the wall not ...
user avatar
0 votes
Accepted

Honeywell 5-wire zone valve wiring

In the spirit of trial and error, I removed the jumper wire today. The valve stopped relaying the call for heat to the boiler. So I suppose the jumper completes a circuit in the valve to transfer the ...
user avatar
2 votes

Can I pigtail a "C" common wire to power a Smart Thermostat to the 24v wires coming from the outside AC compressor?

I was able to answer my own question here. By knowing what wire from the outside compressor is connected to the wire going to the "Y" on the thermostat (in my case it was the white wire ...
user avatar
2 votes
Accepted

Existing thermostat wire colors - no white?

Someone used telephone wire (2-pair red/green & black/yellow) for the thermostat wire here. So, ignore anything you may think applies about "thermostat wire colors" and just pay ...
user avatar
  • 133k
0 votes

Ecobee 3 Lite / Fan Center for Fan Coil / Aquastat

Here is a diagram of how your fan control should be wired: Note that all three boxes on the right are contained in the fan control. The middle box represents the terminal block on the front of the ...
user avatar
  • 26.6k
1 vote
Accepted

Lennox Wiring for Ecobee SmartThermostat

The issue was that the C and Y wires apparently went nowhere. I traced them as best I could, but couldn't figure it out. Fortunately, there was a deprecated humidifier control box right next to the ...
user avatar
1 vote

Is it possible that Thermostat Y wire and C wire is the same wire on my air handler (furnace)?

Connect your C to the purple wire The reason the first diagram seems confusing is because they dot the Y wire in from the thermostat to the outdoor unit, but do not specify a color for it. This is ...
user avatar

Top 50 recent answers are included