No C Terminal On Furnace Control Board at Gustavo Collins blog

No C Terminal On Furnace Control Board. Instead of dealing with the hassle of installing a new thermostat or running a new c wire from your thermostat to the furnace. With some heating/cooling systems, there may not be a control board connector labeled as c, “com” or com 24v. Newer hvac controls include the c terminal, but when working with older controls, the only option is to find and tap into the c circuit somewhere. (it won't power up, but it won't. In this example diagram, you can see that one leg of the secondary connects to the r terminal on the control board, and the other leg connects to the c terminal. If you don't know which one is c, try one. The hvac control board is where the thermostat wires connect to your heating and cooling system. In this example there's actually a c. Locating your hvac control board and identifying the common terminal: If it turns out to be r, that will do nothing to your thermostat. Look for terminals marked with letters.

The hvac control board is where the thermostat wires connect to your heating and cooling system. In this example diagram, you can see that one leg of the secondary connects to the r terminal on the control board, and the other leg connects to the c terminal. (it won't power up, but it won't. Locating your hvac control board and identifying the common terminal: With some heating/cooling systems, there may not be a control board connector labeled as c, “com” or com 24v. In this example there's actually a c. If you don't know which one is c, try one. Look for terminals marked with letters. Instead of dealing with the hassle of installing a new thermostat or running a new c wire from your thermostat to the furnace. If it turns out to be r, that will do nothing to your thermostat.

Old furnace with no "C" terminal for wifi thermostat Home Improvement

No C Terminal On Furnace Control Board In this example there's actually a c. In this example there's actually a c. Instead of dealing with the hassle of installing a new thermostat or running a new c wire from your thermostat to the furnace. Newer hvac controls include the c terminal, but when working with older controls, the only option is to find and tap into the c circuit somewhere. With some heating/cooling systems, there may not be a control board connector labeled as c, “com” or com 24v. The hvac control board is where the thermostat wires connect to your heating and cooling system. If you don't know which one is c, try one. In this example diagram, you can see that one leg of the secondary connects to the r terminal on the control board, and the other leg connects to the c terminal. Locating your hvac control board and identifying the common terminal: Look for terminals marked with letters. If it turns out to be r, that will do nothing to your thermostat. (it won't power up, but it won't.