Ahh, just another ordinary day. Lennox G26Q3/4-100-6 Installed in 99 (not by me). Problem is intermittent. Works fine, then next time just the inducer runs and no heat. I got there the other day. Customer says they have had off and on heating problems since they had it installed. Previous company has been changing limits, press switches, etc. Still same result. Sometimes it works. Other times it dont. I checked everything and couldnt make it screw up. Error Code Led 1 Led 2 Off Slow flash
*Press sw open or has opened after 5 times, clogged condensate lines, vac hoses, flue, blah, blah (you know the drill.)* I finally figure (guess) the press sw is bad as all the old metal ones seem too. I took a shot and found the same day that I was wrong. No harm. Im not billing them for incorrect diagnosis nor wrong part. "Yes kids, even I have to take a stab at a diagnosis once in a great while when i cant make the damn thing screw up in front of me." I pull out the last resort and call Lennox to see if they have any oddities that jump out at them. I describe the problem to them (no heat and the vent motor just running and running). Seems they had a lot of that. The guy tells me immediately it is the "Surelight" control board causing it. The board has a relay that sticks. Kill the board and it works again until next time. Change the board and all will be well. Dont you just love "idiot lights"? I didnt even ask the price. I know this one is going to "hurt bad". Customer is happy as hell. I found the problem in one visit that the other company (can you say, "Service Experts") and all there techs (10) couldnt find in five years! Bubba I still hate Lennox. There parts are just too damn expensive.- posted
19 years ago