pitteach
New Member
I have a Lennox 75k Btu 90+ furnace that will not light. (Approx 15 yrs old)
This is the first attempt of the season.
Here's what I've got:
Turn on tstat and call for heat.
Exhaust blower kicks on.
After a few seconds, the intermittent ignitor starts firing.
It keeps firing for almost a minute and while it does, the main blower kicks on but it does not light.
The main blower stays on for about a minute, shuts down and the ignitor stops.
The exhaust blower stays running continuously.
It seems like there is no gas coming to the manifolds.
The gas valve is in the on position.
Any ideas? I am surprised that the main blower would come on without any heat. Could this be a clue? The unit ran fine when shut down last winter and I have just replaced the tstat before this happened.
Any ideas would be greatly appreciated.
This is the first attempt of the season.
Here's what I've got:
Turn on tstat and call for heat.
Exhaust blower kicks on.
After a few seconds, the intermittent ignitor starts firing.
It keeps firing for almost a minute and while it does, the main blower kicks on but it does not light.
The main blower stays on for about a minute, shuts down and the ignitor stops.
The exhaust blower stays running continuously.
It seems like there is no gas coming to the manifolds.
The gas valve is in the on position.
Any ideas? I am surprised that the main blower would come on without any heat. Could this be a clue? The unit ran fine when shut down last winter and I have just replaced the tstat before this happened.
Any ideas would be greatly appreciated.