How do I know if my sail switch is bad?
Remove the 2 wires from the sail switch. If the switch is bad, this will at least show as “open” and turn the blower on. Turn the furnace ON. If the blower does not come on, and blinks 1 time again, it is most likely a short somewhere in the wire harness of the furnace.
What does a sail switch do in a RV furnace?
It has a microswitch which senses when the fan is pushing air. The switch is there to prevent the furnace from firing if the battery is too low to run the fan at the correct speed. Unfortunately, the switch will not close when fluff collects in it.
How do I test my RV sail switch?
It’s easiest to test with the switch removed. Attach the red and black leads of the multimeter – again set to ohms – to the two terminals on the switch. If the switch is good, there should be a reading similar to that of a good sail switch. If it reads “OL” or “open line” then the switch is bad.
Why is my furnace clicking but not turning on?
The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. This is typically the problem if you can hear your furnace click on but it does not fire up. First, you need to turn off the gas to the furnace. Then, remove the front panel to find the ignitor or ignition sensor.
Why Is My RV furnace not working?
One other RV heater troubleshooting tip is: check the thermocouple. Be sure it is clear of any spider webs or insect nests. The thermocouple needs to be in the correct position in the burner to work correctly. If the thermocouple is bad, remove it and buy one exactly the same as the one you are replacing.
What does the limit switch do on a RV furnace?
The furnace fan limit switch is designed to activate and deactivate the furnace blower assembly. This component is responsible for transmitting warm air throughout the air ducts in your home. In addition, the furnace limit switch is also engineered to shut down the furnace to ensure it doesn’t overheat.
Why won’t my furnace in my RV turn on?
Check to make sure your battery is sending 12 Volts to the furnace unit. You should also check the breaker box to see if the furnace breaker or fuse has blown. Next, double-check the vents for any signs of dust or soot buildup. This includes the RV exhaust vent.
What is a sail switch on an Atwood furnace?
This is a replacement sail switch for select Atwood DF Series Furnaces. The sail switch acts as a safety device, making sure there is no propane flow without air flow.
Why does a Dometic furnace air flow sail switch work?
It is a safety component that will not let ignition occur until it sees 75% of the motor’s rpm’s. It insures that the combustion wheel is rotating fast enough so that there is a proper air and gas mixture for smooth ignition. When the paddle of the switch is depressed, there should be continuity through the switch.
Where is the sail switch on an RV?
If I had known where the sail switch was located, you can access it by removing the top half of the fan enclosure. The job of the sail switch is to tell the system that your fan is spinning fast enough then it sends the propane to be ignited. This is done as a safety precaution for your RV won’t catch on fire.
When to replace the sail switch on a furnace?
It insures that the combustion wheel is rotating fast enough so that there is a proper air and gas mixture for smooth ignition. When the paddle of the switch is depressed, there should be continuity through the switch. If a sail switch needs to be replaced, it should be replaced with the exact same size.