Atwood Rv Furnace Sail Switch

As a result the vent will work but no heat will be produced.

Atwood rv furnace sail switch.

The sail switch is an air proving device. The sail switch acts as a safety device making sure there is no propane flow without air flow. Furnace would not light. How do i test sail switch on the furnace it s 8531 atwood hydroflame answered by a verified rv mechanic we use cookies to give you the best possible experience on our website.

It is a safety component that will not let ignition occur until it sees 75 of the motor s rpm s. After replacing the sail switch my furnace works perfectly. It insures that the combustion wheel is rotating fast enough so that there is a proper air and gas mixture for smooth ignition. Took it all back apart and found the new sail switch worked 1 time.

If i had known where the sail switch was located you can access it by removing the top half of the fan enclosure. This is a replacement sail switch for select atwood afs series furnaces. Diy with rv replacing limit switch atwood 8535 so at some point of course that was a coldest part of our trip in yellowstone furnace atwood 8535 iii started blowing cold air only. Ordered attwood 36680 s w and installed it furnace and it worked fine.

By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. I pulled my entire heater out of my rv but didnt need to. Removed my rv furnace and bench checked it to find a bad sail switch. After reading numerous articles forums manuals i started troubleshooting and found out that limit switch don t confuse it with sail switch is not.

Dometic atwood 33063 replacement low air flow sail switch. Took the furnace back to the rv cold night and installed it. An rv furnace has an internal sail switch that will prevent the machine from igniting in cases of air flow being insufficient for combustion. Several things can be checked for a cause in this case.