Hi, I'm pretty inexperienced working on furnaces but am hoping someone with more knowledge could help me fix it. Just a few days ago I turned on my heat and noticed it wasn't working. It's a natural gas York model TG9S060B12MP11A. I believe its 7-8 years old. I've lived in the house for 2 years and haven't had any problems. Only maintenance I've done is changed filters every couple months.
When I turn it on the fan starts running. Then igniter glows orange. Then the burners fire for 3-4 seconds and then go out. It repeats this series 3 times and shuts down with the blower kicking on. The error code I get is "Ignition lockout due to retries".
I changed filter for the heck of it and still doesn't work.
I tried cleaning flame sensor with no luck. The old one looked pretty nice even before cleaning. I bought a new one made by Source 1 and furnace still doesn't work.
The Hot Surface Igniter visually looks very nice. I did a resistance test on it (using cheap multimeter) and got 85 ohms.
The ground wire attached to the body looked very clean with no corrosion, but I cleaned it anyway. Still not working.
One thing that's weird is throughout my 20 or so attempts to get it going, a couple times it did stay running for awhile. I only ran it for 10-20 minutes just because the weather warmed up and didn't need it. Then next time I turned it on it had the same old problem. The unit is located in my basement which does get kinda damp in the warmer months.
Not sure if its related, but over the summer I did change my water heater from a tank natural gas to tank electric. That might sound dumb but I did it so I could eliminate my deteriorating chimney in order to fix up the roof which had a few leaky areas.
Any advice or suggestions would be very much appreciated!
Sean
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