Atwood Furnace Limit Switch Location

It s function is to monitor the combustion chamber heat level.

Atwood furnace limit switch location.

Depending on your furnace model the switch will be surrounded by a silver or white cover. The limit switch is not hard to find or replace. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. Ordered new limit switch atwood 37022 hydro flame limit switch 190 degrees around 15 with shipping paying attention to get one with correct limit temperature and also trying to find out with rv manufacturer for no reason i decided to contact them not atwood whether it s possible to take sail switch out without taking the furnace unit out.

The larger assembly needs to be removed to access the motor so it can also be removed. Locate the white limit switch. If the temperature of the combustion chamber exceeds the preset limit the switch will open and disrupt the flow of current to the circuit board in effect shutting down the main burner. I tried firing up my furnace in my rv it sounded good at first until it never ignited.

9 times out of 10 it is the delay switch. The limit switch is a simple temperature controlled switch. So i did some research read manuals and narrowed it down to the sail. This is part 1 in a sears of videos for the operation diagnosis and repair of an atwood furnace.

The limit switch is behind the blower assembly. The fan blade assembly on the combustion chamber side stays in it s cage. Furnace is running but not firing up so either the delay switch is broken or the circuit board.