Rv Furnace Blowing Cool Air

If so the limit switch a furnace safety device turned the furnace burners off.

Rv furnace blowing cool air. Fan is running but furnace produces no heat. This issue or if the furnace is blowing cold air could be due to the circuit board issue or the limit switch issue. It worked fine in june and we didn t use it through the summer but now it does read more. It s possible your furnace overheated.

Several things can be checked for a cause in this case. Anything under 10 5 will result in the fan operating but just blowing cold air as the gas valves will not open. Your next rv furnace troubleshooting is to verify that there is 10 5 volts of battery power coming into the unit. A weak power source won t trigger the sail switch and it won t regulate the air flow.

It does kick on and off. Once again the low battery voltage can be the issue here so the best thing to do is to replace the battery. Rv furnace troubleshooting may also be necessary when a spider has spun its web inside the furnace area. 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.

After all a furnace shouldn t be blowing cold air right. As a first step you may want to clean the combustion area. People get confused and sometimes even scared when this happens. Furnace could also make nosie.

I have a duo therm propane rv furnace that will only blow cold air. 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. Rv furnace stops and starts.

This issue is often caused by the thermostat receiving false readings. An rv furnace has an internal sail switch that will prevent the machine from igniting in cases of air flow being insufficient for combustion.