Rv Furnace Blowing Cool Air

Rv furnace troubleshooting may also be necessary when a spider has spun its web inside the furnace area.

Rv furnace blowing cool air.

This issue is often caused by the thermostat receiving false readings. Fan is running but furnace produces no heat. We have plenty of propane. I have a duo therm propane rv furnace that will only blow cold air.

Rv furnace stops and starts. An rv furnace has an internal sail switch that will prevent the machine from igniting in cases of air flow being insufficient for combustion. As a result the vent will work but no heat will be produced. The blower keeps blowing to cool the furnace down to a safe level.

2 furnace overheated let s say your furnace blows hot air then cold air but then stops blowing any air at all after a while. It does kick on and off. Several things can be checked for a cause in this case. A weak power source won t trigger the sail switch and it won t regulate the air flow.

This issue or if the furnace is blowing cold air could be due to the circuit board issue or the limit switch issue. People get confused and sometimes even scared when this happens. Once again the low battery voltage can be the issue here so the best thing to do is to replace the battery. Furnace could also make nosie.

Either hot air from the duct is blowing on the thermostat causing it to think the rv is warmer than it actually is or cold air is blowing across the thermostat resulting in a similar issue. Anything under 10 5 will result in the fan operating but just blowing cold air as the gas valves will not open. It s possible your furnace overheated. Common rv furnace problems include the furnace wont light it wont heat properly or it could cycle on and off.

If so the limit switch a furnace safety device turned the furnace burners off. As a first step you may want to clean the combustion area.