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Old 11-30-2021, 07:02 PM   #1
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Heater

The heater blowers comes on blows cold air and will not ignite. One mechanical said loose wire but worked only once before quitting again. Where is access to check airing etc. 2018 redhawk 22J.
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Old 11-30-2021, 07:26 PM   #2
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Exterior panel gives you access to it. One thing among others is if the sail switch which detects air flow goes bad it will not ignite. Fan will blow air for several seconds and if that is not detected will shut off. You can download info off the internet
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Old 11-30-2021, 08:26 PM   #3
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Post which model furnace you have and if you have an exterior access panel which makes it easier to work on. Does yours look anything like this?
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Old 11-30-2021, 08:33 PM   #4
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Per a Google search you have an exterior access to your furnace. When you put it back together, there is a strong chance you will need to remove the exhaust cover. If you're not farmilar with what the access panel looks like, it is the panel on the passenger side at floor level directly below you stove exhaust.

Can you describe what is happening?

The sail switch is the most common failure on the furnace. With the outside access this switch should be very easily accessed.
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Old 11-30-2021, 08:40 PM   #5
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2018 may look more like this. The sail switch is circled in yellow. You can check continuity with the fan running or take it out and check. If it checks good it’s a good possibility it’s the control board. I keep a spare board just for this reason. They don’t like getting wet. Had a lot of rain lately? Atwood even makes a relocation kit to get the board away from moisture. I sealed around my access door really good for this reason. The boards are very easy to change out. It’s the board in the pic with the circuits. Low battery voltage will cause the fan to run but not fast enough to trigger the sail switch.
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Old 11-30-2021, 09:03 PM   #6
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When you get access to the board you should see a light blinking with a code. Probably a fail to ignite 3 blinks.
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