Our 2024 390RK furnace would not come on. We had to take the fuse out for 10 minutes. Upon putting the fuse back in the furnace fan would come on and the furnace would ignite.
Sounds like it tried to light and failed. Most gas RV appliances go into lockout mode after three ignition attempts, and a power cycle is how you reset it.
Tried removing the fuse again. This time it did not restart. I wonder if the solar panels system has any effect? Gonna turn everything off and try to reset that way.
Our furnace would try to light initially but eventually would not even do that. Had Mobile Mechanic check it and diagnosis determined the control board was bad. Problem solved $400+ dollars later but a nice cozy cab now.