Discussion Starter · #1 ·
Hi, I have an old gravity furnace that uses an old general controls magnetic valve controller. The pilot is working and the voltage between the screw and the wire nut is a totally reasonable 600 millivolts. But the furnace isn't working. The pilot doesn't light up the flame, which means the gas isn't entering the furnace for some reason. Can anyone recommend troubleshooting steps to get my furnace up and running again? Thanks so much.