![]() and when I turn the gas valve (7100) on and off rapidly (I hear slight poofing) it will light but takes a lot of times 10+ And, the furnace will run normally untill its not calling for heat and turns off not to restart! SO i'm thinking maybe the pilot line is somewhat plugged as you suggest. So I have checked voltages, I have good spark, all gas valves are on including meter. Loosen the brass ferrule compression fitting that holds the pilot tubing in the gas valve and see if you have gas coming out when you have the furnace switched on as you describe." If that's the case, the pilot light may be plugged up, preventing gas from flowing. "Also make sure that the gas hasn't been shut off at the electric gas valve, which probably has an "on" position, and that the furnace shutoff valve is on. You gave this answer on a similar problem> ![]() I have the same setup a Robertshaw 780-7 DER-57C gas valve and the pilot wont light but when I turn the gas valve on the 7100 on and off rapidly it will light. Hello new on here and was reading a previous old post about a pilot not lighting on a gas furnace.
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