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Old 12-25-2018, 04:30 PM   #29
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A sail switch is mounted right in front of blowing air. Its purpose is to flip the switch just in case there is sufficient air flow; and, conversely, not to flip the switch just in case of low or no air flow.

A fly in the ointment of many sail switches is that they can fail if they become too dusty; "repair" thus amounts in some cases to blowing them out with compressed air. (In the case of some Suburban furances on older Airstreams, I also note that the manufacturer slightly increased the size of the sail itself.)

Here's a shot of one flavor of the sail switch. You can see the arm that operates via air flow to flip the switch.





Lynn
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Old 12-25-2018, 06:22 PM   #30
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Tough to say. I have a 2015 19' International and all of the furnace bits are accessible from the outside, once the four screws that secure the outer cover, and maybe two others, are removed. The sail switch is pretty obvious on mine.

The manual could be helpful, too.

http://bryantrv.com/docs2/docs/hflamefurn04.pdf

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Old 12-26-2018, 09:51 AM   #31
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Well...

Airstream is taking a LONG week end... No support available....

Anyone know if they're gonna show up this week or are they off through the 1st?

I hope they're nice and warm......


sigh...

W
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Old 12-26-2018, 10:02 AM   #32
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Rounder44,

Maybe if you post pic of outside of furnace someone can tell you how to open it up and as mentioned look for code light.

Also do you have the furnace mfgr manual and checked itís troubleshooting guide ?

Wish I was off this week too.

Gary
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Old 12-26-2018, 10:15 AM   #33
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Quote:
Originally Posted by GCinSC2 View Post
Rounder44,

Maybe if you post pic of outside of furnace someone can tell you how to open it up and as mentioned look for code light.

Also do you have the furnace mfgr manual and checked itís troubleshooting guide ?

Wish I was off this week too.

Gary

Thanks!

I got it opened and found the code indicating sail switch etc...

I just don't know how to get at it without yanking the entire furnace out and possibly voiding warranty. It's a 2019 Sport 22FB. 1 week on the road...

The manual is full of warnings and legalize and seriously lacking on details. I'm glad Atwood was able to save a few cents and print a boiler plate manual for all their furnace but useless in a problem situaltion....

Thanks!

W
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Old 12-26-2018, 10:42 AM   #34
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Can you post Atwood model number for furnace?

Also couldnít hurt to post pic of furnace with doors open so folks can peak at it and itís wiring.

Canít reread all of your posts now but if you tried to turn it on what does it do? Nothing, tries to start but doesnít fire up etc.
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Old 12-26-2018, 11:25 AM   #35
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Quote:
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Can you post Atwood model number for furnace?

Also couldnít hurt to post pic of furnace with doors open so folks can peak at it and itís wiring.

Canít reread all of your posts now but if you tried to turn it on what does it do? Nothing, tries to start but doesnít fire up etc.

Not sure of model number but attached the photo again.

Fan goes on, won't fire up, turns off after ~15 seconds. Led light blinks once every 3 seconds.

I attempted to follow the start up instructions but fan shuts off too quick which indicates sail switch or such.

All attempts have left me with "turn off and call dealer" algorithms....

Seems like it could be a simple fix if not camped out and parts available....


W
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Old 12-26-2018, 11:44 AM   #36
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Ok long shot time.

Power OFF.

Check any possible connections by slight wiggle and push on to seat any wire crimped to spade or other connections. Any that have a screw connection just wiggle and slight tug.

This is a simple POWER OFF connection inspection. And that black can left center with reddish connection might be a capacitor. Caution might be holding a charge.

Gary
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Old 12-28-2018, 09:10 AM   #37
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Fixed!!!!

Connection issue! I pulled off the connections again and really worked them and it has fired up constantly!

GREAT RV tech in Quartzsite coached me through the issues. He informed me than in 36 years of RV repair fully HALF of the furnaces he goes to repair fix them selves when by the time he gets them pulled and to his bench!

HALF don't need any more than connections cleaned up!

Very weird if you ask me.....

I'm starting to see the wisdom of a spare board and read a little about the Dinosaur boards that seem to be an upgrade...

The tech also strongly suggested a Blue Flame brand replacement furnace or part of explaining it has a built in thermostat..... Phone connection was poor and we kept getting distracted so not sure exactly about the Blue Flame...

Any other thoughts to put the furnace issues to bed once and for all?

Thanks,

W
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Old 12-30-2018, 10:26 AM   #38
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There is a new thread carrying on this conversation FYI:

http://www.airforums.com/forums/f459...lp-190634.html

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Old 12-30-2018, 01:43 PM   #39
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If nothing else works, there is a reset switch on the furnace. The unit must be powered for the switch to work.
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Old 12-31-2018, 12:28 AM   #40
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It sounds like you are warm for now!
Since this all started when you reconnected your propane bottles, here is a not-unusual happening:
New propane tanks and Acme connectors now (for a decade or two) have a fast-flow close valve. In other words, to prevent a fire should you sever a hose or other downstream connection, the valve senses this and shuts down - sometimes with a minimal flow. This fast flow often comes when you open the tank and fill the unpressurized lines with gas.
The solution to this is to shut off the propane tank completely, then open slowly while the lines fill.
It's always #1 in troubleshooting propane, especially if you have disconnected the tanks.
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Old 12-31-2018, 05:50 AM   #41
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Maybe the sail switch

I had same symptoms. Fan for a while then nothing. There is a switch that detects that the fan is working. Called a sail switch. On my unit it is easy to access with the exterior panel removed. It is screwed to the fan housing right in front. Easy to check with a meter if itís working. In my case I removed the switch, checked it with a meter, it checked ok, then I put it back in and all is well. I think it had stuck in the on position which is a no go for the furnace logic. I ordered a new one and it lives in my tool box as a back up.
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Old 12-31-2018, 07:07 AM   #42
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There is a later thread on this FYI.

Quote:
Originally Posted by OTRA15 View Post
There is a new thread carrying on this conversation FYI:

http://www.airforums.com/forums/f459...lp-190634.html

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