Furnace black smoke

bobndot wrote:

Holiday27 wrote:
I replaced the regulator and still have the same issue. So frustrated. Could low voltage cause this?

First thing to know.
When you pulled the furnace out to test it outside of the rv, did you use the same 12v power source or a different power source ?

There is a link that i saved that might be worth a read. It might cover something you missed.
It covers outside and inside furnace operation.

https://www.rvtravel.com/ask-dave-furnace-functions-irregularly-rvdt-1733/

Thanks! I'll check it out.

I connected it to my car and a BBQ propane tank. It ran great. That's why I'm thinking possible voltage issue. Later tonight I'm going to try to run it with and external propane tank to eliminate that as an issue...