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Old 12-06-2012, 05:44 PM   #1
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Furnace problem

I recently purchased a 2006 safari and was camping over thanksgiving and the furnace was woking fine. Later on it stopped working altogether, nothing. After checking a few things I noticed a flashing red light 3 seconds apart. The manual said fault limit switch so I was perplexed. So I called Atwood and described the problem and they suggested that I knock on the housing to possibly unstick the sail switch, It worked and all is normal.
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Old 12-06-2012, 07:43 PM   #2
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I recently purchased a 2006 safari and was camping over thanksgiving and the furnace was woking fine. Later on it stopped working altogether, nothing. After checking a few things I noticed a flashing red light 3 seconds apart. The manual said fault limit switch so I was perplexed. So I called Atwood and described the problem and they suggested that I knock on the housing to possibly unstick the sail switch, It worked and all is normal.
Hey...wait a minute.

Knock on wood was always by itself.

Now we have "knock on sail switch housings" ????

Who knows, maybe a new way to bring luck, or something........??

Andy
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Old 12-06-2012, 09:04 PM   #3
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In another thread, I described some of the things we have had go wrong with the furnace in our 2002 Bambi. One of the things I replaced twice was the sail switch because it was sticking. Then I found out (on my own) that I could bang on the side of the furnace at about the location of the sail switch and get it to unstick. I have used the method several times and the last time seems to have done the trick. The furnace has ignited like a champ the last couple of years.

Tim
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Old 01-15-2013, 10:13 PM   #4
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Where did you bang furnace to fix sail switch.
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Old 01-16-2013, 06:40 AM   #5
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furnace problem

The reconmendatiom from Atwood was the lower left housing. It looks like motor casing black in color.
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Old 01-17-2013, 12:45 AM   #6
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Banging worked furnace working good again.
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Old 01-17-2013, 07:33 AM   #7
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The sail switch is a microswitch with a plastic "blade" attached to it. It is mounted in the output air flow of the main blower. The force of the blowing air lifts the "sail" and turns the switch on.

This tells the control board the blower is running, and that is ok to light the burner.

As it is in the air flow, it can get dirty and stick in the off position and keep the burner from lighting. If you are able, taking a panel or two loose to blow out the area with air may be a longer term fix.

Regards,

JD
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Old 01-17-2013, 11:59 AM   #8
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Usually just removing the sail switch (a pretty good task in some models) and using compressed air on it will solve the problem.

On our older unit, the manufacturer slightly enlarged the size of the sail itself. Hoping that helped with ours! I'd only fixed the thing six or seven times prior to installing the new switch.


Lynn
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Old 01-17-2013, 12:50 PM   #9
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I just bought a 1999 23 footer. The furnace did not work and after reading this thread I banged on the black housing to no avail, then I saw a diagram showing a tiny switch on top of the housing. I turned this switch on and the blower turned on but it made a weird sound then the switch turned off the blower. This happened about 3 or 4 times. Any suggestions???
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Old 06-07-2017, 04:23 PM   #10
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Let me restart this old thread.

My Atwood 8525 furnace was working well this spring but has since quit. Same problem as post #1; blower starts then shuts off without trying to light the burner, and the red light flashes once.

I've checked the airflow, and it doesn't seem obstructed. Using an inspection scope, I had a look at the blower air intake under the couch, and nothing is in the way there.

Seems like a sail switch problem. It is supposed to be behind the blower, so banging on the front won't jar it any. I would like to find a video of how to dismantle this thing to get to the switch.

Randy
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Old 06-07-2017, 07:49 PM   #11
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If memory serves, the sail switch on these is mounted traversely under that rounded black plastic cover. Kind of a pain because you need to get all that wiring out of the way first. But since it is a good deal of work, you might also want to check youtube for diagnostic tests to make sure it's the sail switch.


Lynn
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Old 06-08-2017, 05:10 AM   #12
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We also had that problem, if memory serves me correctly the furnace wouldn't come on at all. I took A long screwdriver and put it on the bolts that attach the motor and taped on the screwdriver with a hammer. Still works to this day. Good luck!
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Old 06-08-2017, 06:58 AM   #13
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If memory serves, the sail switch on these is mounted traversely under that rounded black plastic cover. Kind of a pain because you need to get all that wiring out of the way first. But since it is a good deal of work, you might also want to check youtube for diagnostic tests to make sure it's the sail switch.


Lynn


You are correct. That's where the manual's diagram shows it. Four screws hold that cover in place and inside is the blower fan cage. But as you said, there is a lot of wires to get out of the way. Still searching for a video or photos showing this coming apart.
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Old 06-08-2017, 07:02 AM   #14
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FYI Bob [CruizinDux] should be reporting soon on a possible sail switch fix here:

http://www.airforums.com/forums/f427...ng-165259.html
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