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...
Do you have the manual for the heater? It probably/must have an overtemperature safety. This is probably a thermocouple to a relay. The safety may need to be replaced. You may be able to limp by lowering the setting after some period less than that which causes the cycle to begin. Leave the lower setting, probably >5 degrees for an hour then go back to the original setting, recycle until sleep sets in then use electric heaters or blankets.