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12-29-2019, 01:56 AM
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#1
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Senior Member
Join Date: May 2015
Location: Oxnard
Posts: 257
California
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Atwood 8940 Furnace - Won’t Start!
We just nearly froze for a week over Christmas. The Atwood 8940-III DCLP furnace simply would not even start. Checked the fuse, the reset switch, did the init thermostat, flipped the tanks, still nothing. It does 3 tries of clicking, then it quits with one red led flash error code. Is that the blower motor? The blower never comes on, and that happens first, as I understand it. It worked the first day for about an hour, then nothing. Any ideas what else l could check?
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2015 Voltage 3800 w/ Epic IV, Int&Ext, Garage Pkgs; 8x100W Solar, 2x Xantrex C35 Charge Controllers, SW2000 Inverter & Monitor; 2005 Chevy Duramax Dually 3500 w/Banks; Kawi KFX700 & Polaris Scrambler 500 ATVs.
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12-29-2019, 10:45 AM
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#2
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Site Team
Join Date: Jun 2014
Location: Sprung Leak
Posts: 3,157
North Carolina
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One flash error code is a limit switch/airflow issue. Which would make sense because the blower isn't coming on. Double-check your fuses and connections to the blower and make sure it is getting a full 12 volts. IIRC there is a relay in the circuit too that could cause issues.
Aaron
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There is madness to my methods
2015 Coleman CM16FBS(traded) 2016 Concord 300DS
2015 Ford Fusion Hybrid following along
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12-29-2019, 06:03 PM
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#3
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Senior Member
Join Date: Oct 2017
Location: Aiken
Posts: 702
South Carolina
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I just fixed our heater by cleaning out the "mud dobbers" AKA "dirt dobbers". They had built nests in the exhaust. The love propane apparently.
Good Luck.
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"the older my father got the smarter I got"
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12-30-2019, 08:50 PM
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#4
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Senior Member
Join Date: May 2015
Location: Oxnard
Posts: 257
California
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Quote:
Originally Posted by wahoonc
One flash error code is a limit switch/airflow issue. Which would make sense because the blower isn't coming on. Double-check your fuses and connections to the blower and make sure it is getting a full 12 volts. IIRC there is a relay in the circuit too that could cause issues.
Aaron
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So I opened it up, jiggled all the wires, reset everything, tried again. I got the blower to come on, but never felt heat, and it quit after about 30 seconds, with the one flash error code.
__________________
2015 Voltage 3800 w/ Epic IV, Int&Ext, Garage Pkgs; 8x100W Solar, 2x Xantrex C35 Charge Controllers, SW2000 Inverter & Monitor; 2005 Chevy Duramax Dually 3500 w/Banks; Kawi KFX700 & Polaris Scrambler 500 ATVs.
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12-30-2019, 09:16 PM
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#5
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Senior Member
Join Date: May 2013
Location: Cody
Posts: 1,764
Wyoming
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Take a look at my initial post at the following link, and see if the symptoms are similar:
http://www.dutchmenowners.org/forums...ssue-5084.html
I had an issue with mine a few years ago. Because of some medical issues and the location I was in at the time, I never did get it figured out that winter. But a few months later, after I had moved to a place where they had a mobile tech... he diagnosed it right away. The solution was a simple replacement of the sail-switch.
He installed a new one, and it fired right up. A $15 part. Go figure...
Not saying yours will be as simple, but just throwing it out there
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Tom
2013 VOLTAGE 3200 (EPIC I & II)
2014 Ford F-450 PLATINUM
2018 BMW R1200GS RALLYE
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12-31-2019, 10:45 AM
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#6
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Site Team
Join Date: Jun 2014
Location: Sprung Leak
Posts: 3,157
North Carolina
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Quote:
Originally Posted by VCToyhauler
So I opened it up, jiggled all the wires, reset everything, tried again. I got the blower to come on, but never felt heat, and it quit after about 30 seconds, with the one flash error code.
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Need to test the sail switch.
Aaron
__________________
There is madness to my methods
2015 Coleman CM16FBS(traded) 2016 Concord 300DS
2015 Ford Fusion Hybrid following along
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12-31-2019, 06:55 PM
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#7
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Senior Member
Join Date: May 2015
Location: Oxnard
Posts: 257
California
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Quote:
Originally Posted by wahoonc
Need to test the sail switch.
Aaron
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THAT WAS IT! The sail switch is on the inside of the outer blower cover on the atwood 8940-III DCLP. It’s pushbutton switch spring was shot and it was just flapping. Ordered new part 36680 on Amazon.
__________________
2015 Voltage 3800 w/ Epic IV, Int&Ext, Garage Pkgs; 8x100W Solar, 2x Xantrex C35 Charge Controllers, SW2000 Inverter & Monitor; 2005 Chevy Duramax Dually 3500 w/Banks; Kawi KFX700 & Polaris Scrambler 500 ATVs.
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01-02-2020, 10:05 PM
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#8
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Senior Member
Join Date: May 2015
Location: Oxnard
Posts: 257
California
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Fixed! Atwood Furnace Sail Switch
Quote:
Originally Posted by VCToyhauler
THAT WAS IT! The sail switch is on the inside of the outer blower cover on the atwood 8940-III DCLP. It’s pushbutton switch spring was shot and it was just flapping. Ordered new part 36680 on Amazon.
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Update: Received new sail switch, replaced, problem SOLVED.
__________________
2015 Voltage 3800 w/ Epic IV, Int&Ext, Garage Pkgs; 8x100W Solar, 2x Xantrex C35 Charge Controllers, SW2000 Inverter & Monitor; 2005 Chevy Duramax Dually 3500 w/Banks; Kawi KFX700 & Polaris Scrambler 500 ATVs.
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01-02-2020, 10:06 PM
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#9
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Senior Member
Join Date: May 2015
Location: Oxnard
Posts: 257
California
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Yep! That nailed it. 😎
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2015 Voltage 3800 w/ Epic IV, Int&Ext, Garage Pkgs; 8x100W Solar, 2x Xantrex C35 Charge Controllers, SW2000 Inverter & Monitor; 2005 Chevy Duramax Dually 3500 w/Banks; Kawi KFX700 & Polaris Scrambler 500 ATVs.
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01-02-2020, 10:29 PM
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#10
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Senior Member
Join Date: May 2013
Location: Cody
Posts: 1,764
Wyoming
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Tom
2013 VOLTAGE 3200 (EPIC I & II)
2014 Ford F-450 PLATINUM
2018 BMW R1200GS RALLYE
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