Iím having a problem with my (ancient) Lennox G11Q3E-110V-6 gas furnace. Whatís happening is:
Comes on (spark, pilot, main burners come on almost simultaneously)
Stays on for 1 to 45 seconds (measured: 19,2,12,24,12,14,1,7,45,19 seconds)
Goes off for between 6 to 52 seconds (measured: 50,10,24,26,17,6,10,19,52 seconds)
Comes back on (spark, pilot, main burners come on almost simultaneously)
And on and on and on. Sometimes thereís a rapid click-click-click (of the valve?) when itís off.
Iíve looked around in there and I see thereís a Johnson G60QHL-1 ďPROVEN PILOT CONTROLĒ (maybe not so proven?). That appears to control the gas and pilot valves. Thereís also a ďcam-statĒ thatís currently set to 110 ( think this controls when the fan turns off)
Iíve lived here with this furnace for 9 years and it was pretty good for the first 6 or so. I remember this problem from last year, but I made it through the winter somehow. I tried removing the pilot assembly and cleaning up the thermocouple last year and I thought that helped. Did that again today, but it did not seem to make a difference.