Rv Heater Sail Switch

If your rv furnace isn t working right there are things to check and you ll learn about them here.

Rv heater sail switch.

The sail switch features a paddle arm that covers the blower air stream. Took it all back apart and found the new sail switch worked 1 time. You should check the voltage from the thermostat. It is a safety component that will not let ignition occur until it sees 75 of the motor s rpm s.

The solutions to these are closing the relay switch and the sail switch as well as replacing a faulty blower motor. An rv furnace needs both battery power and a fuel such as propane to function. Removed my rv furnace and bench checked it to find a bad sail switch. Troubleshooting the rv furnace.

If i had known where the sail switch was located you can access it by removing the top half of the fan enclosure. The sail switch is an air proving device. As a result the vent will work but no heat will be produced. Also of note on my heater model the sail switch was mounted inside of the fan enclosure.

We ll also talk about the minimum amount of battery power needed to keep your rv furnace running. This problem would indicate that the thermostat is still requesting more heat. It insures that the combustion wheel is rotating fast enough so that there is a proper air and gas mixture for smooth ignition. After replacing the sail switch my furnace works perfectly.

And in some circumstances it can be caused by a faulty limit switch. An rv furnace has an internal sail switch that will prevent the machine from igniting in cases of air flow being insufficient for combustion. Rv furnace doesn t shut off when temperature is reached. Took the furnace back to the rv cold night and installed it.

Ordered attwood 36680 s w and installed it furnace and it worked fine. I pulled my entire heater out of my rv but didnt need to. Several things can be checked for a cause in this case. Time delay relay used on older furnaces newer furnaces have the relay incorporated into the circuit board this relay performs two separate jobs one to handle the relatively high current needed to run the blower motor and two to allow the blower to run for 45 to 90 seconds after the thermostat is satisfied.