I have a ‘82 Nomad travel trailer. The last couple of times we were camping the furnace will stop blowing hot air. The fan will still be running just will not be blowing hot air. What I do to remedy...
check your co2 detector is doing. if it is going to orange or red it is a furnace issue. take the furnace out which isn't easy and check your electrodes and wiring. my furnace started acting up just like yours. taped a bare wire and replaced electrodes and it has worked fine since.