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Old 11-30-2013, 12:22 PM   #1
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Question Atwood furnace

i am having a problem with my furnace replaced board 6 months ago now i just have air for about a minute or so then furnace stops cant get propane to cut in the board says it could be the air problem or limit switch , i took of the duct work at the back and seems to be lots of air coming through , then i read the manual it says either limit switch or sail switch i have to pull the furnace out to replace them any suggestions on what to replace........

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Old 11-30-2013, 01:42 PM   #2
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the sail switch is the next item "downstream" once the thermostat calls for heat and the blower kicks in. There has to be enough fan force to close the sail switch which triggers the gas valve to open so ignition can occur. I had to replace the sail switch on the furnace in my 5th wheel, only cost me $10.00 for the switch and I had enough access to replace it without removing the furnace. The switch on mine was located inside the fan housing.


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Old 11-30-2013, 03:46 PM   #3
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On most control boards you can access the leads from the sail switch with the probe of a voltmeter by simply shoving it into the molex socket next to the wire.

Look for voltage, indicating the switch is closing.

If it is, check back for the next step.
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Old 12-01-2013, 06:27 AM   #4
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thanks for the info will get one monday
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Old 12-01-2013, 08:47 AM   #5
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thanks for the info , itried what you said while doing it the burner kicked in for few secs then off it did it three times then that was it , if there is something else i can try i would appreciate your info
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Old 12-01-2013, 09:13 AM   #6
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Three times is a failsafe routine for some furnaces. Sounds like you are not getting propane. Can you hear the main burner lighting? Has it worked since the replacement? Do your other propane appliances work, that is, do you have propane?
Ken, Judy, and the Angels--2005 Fleetwood Southwind--2008 Cargo Trailer--2003 EZGO Golf Cart
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Old 12-01-2013, 12:19 PM   #7
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hi ken i guess i didnt explain what i did properly,i have not replaced sail switch yet i was checking for power that is when it kicked on the burner and i do have propane , i checked again now the blower wont come now but the red light on the control panel does not blink only when i turn the switch on and off.thanks for the help.charlie
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Old 12-01-2013, 01:59 PM   #8
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i did get voltage and it turned on the fan and the burner came on 3 times then cant get it to come on again even the fan wont come on ,,,,,,,,,thanks for your help appreciate it ////////charlie

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