Lennox G20 heat issue

Problems related to residential installations.

- Lennox G20 heat issue

Postby Freon » Thu Feb 28, 2013 11:05 pm

Verify the control board is giving the 120 volts the motor needs. Remove the motor wire connected to the Heat terminal on the control board and the motor wire to the neutral terminal on the control board. Then call for heat and measure the AC voltage between the Heat and neutral terminal on the control board. I would expect you should get 120 volts at the t+50 time when the relay closes. If there is voltage, then we go for the motor. There's an easy test.
Most Valued Contributor
Posts: 966
Joined: Sat Jun 18, 2011 11:26 am


Return to Residential