Thor Forums

[taylorbob1]

There have been many threads on this subject
Start by using the SEARCH function

I had a similar problem when I turned-on the furnace for the 1st time, 4 months after I purchased my rig.

Instead of dropping it off at the dealer, I did the following:
1) removed the external cover, then used compressed air throughout the inner workings
2) when that didn’t work, I removed the burner (just 3 screws after disconnecting the propane). I inspected and cleaned everything
3) finally, I adjusted the Spark assembly. Made sure the Spark was “long” enough (increased it to 3/4”). And that the Spark was close to the burner

Once I did all of these things, furnace has worked flawlessly for last 3yrs