Lennox furnace parts g20q3-4e-125-47/4/2023 ![]() ![]() So I went down, switched it off then back on and watched what it was doing: damper door opens, spark spark spark pilot ignition spark spark spark spark spark then flame and spark off but damper door stayed open. I turned the furnace on yesterday for the first time this season, but I could tell after a minute that it was no go. So I figured I'd weigh in as a "Joe Everyguy" who with some research can usually figure things out when something goes wrong and fix it. Hi all, new here and I know this is an old thread to resurrect but I found it when I Google'd my issue with my Whisperheat G20 and I'm sure others will do the same in the future. Manual start makes LED turn on, a click, yes 24volts flowing then no spark or flame. All was well for 4 minutes then the flame went out and now no spark or anything. It lit up and ignighted the gas right after is put the ignighter in. Don't hear the gas valve click on? Also one more thing, no piolt light ignition now. Wierd though, it is giving out 24volts to gas valve from the ground. ![]() Yes, I have the Blue Johnson control Ignition Module. ONe time only I did get a flash code of on 1 sec off for 5. LED goes out, thermosat is calling, no ignition but the blower turns on after a 1 minute to freeze us down real good. Then I decided to change the pilot burner. ![]() LED goes out and sometimes will start up only after manually powering down.
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