I have a suburban 30,000 btu furnace in my 5307 transit conversion.
It was a used unit I salvaged from an RV at the wreckers.
I inspected the unit as carefully as I could, it seemed in good shape, no rust at all.
I inspected the burner and replaced the seals on the access door.
It has been working very well for a few weeks, and lights and cycles with no problem.
But this evening I was out working on the bus and it got a little cold. I turned the thermostat on, the blower came on as usual, but when it lit the burner there was a loud boom and a smell of smoke.
I immediately shut off the propane and killed the breaker.
I had a real good look at everything. Everything was intact, no seals blown, no sign of split seams etc.
I got my fire extinguisher ready and fired it back up again.
This time, no problem, normal operation. Blower starts, then 10 seconds or so later the igniter starts and burner lights.
I cycled it several times and seems normal again.
I am a little nervous about the unit now.
Is this something that can happen, or a sign that the unit is unsafe?
Sorry for the long winded post.
Thanks,
Mike.