Why is my camper furnace blowing cold air?
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In this regard, why is cold air blowing when the heat is on?
Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace's heat exchanger, causing it to overheat. When overheating, your furnace can trip a high limit switch, causing the furnace burners to shut off so that the heat exchanger does not crack.
Also, how do I turn on the furnace in my travel trailer? The main shutoff valve is usually located at the Propane Tanks. To turn on your RV Furnace, you will use your RV's Thermostat. Make sure that the thermostat is set to heat and adjust it to the desired temperature and the furnace or furnaces should automatically kick on and off to maintain the proper temperature.
In this regard, why is my furnace running but no heat?
Dirty filters are the most common cause of furnace problems. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. If the blower is running but no heat is coming out, replace the filter.
What do I do if my heater is blowing cold air?
When your furnace blows cold air, try turning the heating unit off and on. If the air feels warm for a moment or two, then switches to cold, it may be that the flame sensor is dirty. With a dirty flame sensor, your gas burner won't stay lit, causing the air to go cold soon after the furnace turns on.