Suburban SF-42Q Heater

[Phoenixscott]

I have a 2017 Cardinal with a Suburban SF-42Q furnace. It has been working fine until this past weekend. I am at about 5000’ and have not had issues until the rain set in. When it’s raining outside the flame does not stay lit. Once it stops raining it works fine again. I have seen some old blogs stating this type of issue. Has anyone found any solutions to this issue.

[Bama Rambler]

Sounds like the moisture may be shorting out the flame sensing unit and shutting down the furnace.

Please let us know if you figure out exactly what's causing the problem.