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Old 11-16-2014, 08:25 PM   #1
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2017 30' Classic
Washington , Utah
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Furnace Not Working - Troubleshooting Help Please

My furnace is not working. When the thermostat is set to FURN, nothing happens; no blower, no clicking, nothing. The gas is on and the stove lights, the thermostat is set to the correct mode and the temperature is set high enough for the furnace to come on. The 12v fuse is good. I have reset the breaker on the furnace and checked for loose wires.

I am trying to determine whether the problem lies with the furnace or the thermostat. According to the wiring diagram, the blue wires are from the thermostat. How can I test to see if the start signal from the thermostat is reaching the furnace?

Ron
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Old 11-16-2014, 08:43 PM   #2
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Originally Posted by RonaldC303 View Post
My furnace is not working. When the thermostat is set to FURN, nothing happens; no blower, no clicking, nothing. The gas is on and the stove lights, the thermostat is set to the correct mode and the temperature is set high enough for the furnace to come on. The 12v fuse is good. I have reset the breaker on the furnace and checked for loose wires.

I am trying to determine whether the problem lies with the furnace or the thermostat. According to the wiring diagram, the blue wires are from the thermostat. How can I test to see if the start signal from the thermostat is reaching the furnace?

Ron
Connect the blue wires together and your furnace blower should come on, with ignition in about 30 seconds. Also check to be sure that you have 12VDC AT the furnace. If you have 12VDC and you get nothing, you might need a new igniter board. In Atwood furnaces, they are in the upper left corner of the unit. For suburban furnaces, they vary with the model but are generally at the lower left.

Let us know what happens.
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Old 11-16-2014, 09:12 PM   #3
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Before buying new igniter board clean the plug to board and clean board connnecters with a eraser.
If you think you need a new board have a RV mechanic check it with his tester it will tell you what is wrong with board if it is bad.new board is about $125.
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Old 11-16-2014, 09:53 PM   #4
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RonaldC303,

unless you are talking about a trailer other than the one in your profile (2015 28' International), the defect you have discovered should be covered by the Airstream warranty.

If you don't have an authorized dealer close to you, I suggest you call the plant and ask them for help.
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Old 11-17-2014, 11:14 AM   #5
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New furnace issue

Thanks to all that replied to my call for help. First of all, I verified there is 12V power to the furnace. Next I verified that the thermostat is completing the circuit as I have 12V on the return blue wire.

So the blower still does not come on. As suggested I have a call into the factory since the furnace is under warranty. The "good" news is there an Atwood factory service provider about 50 miles away. I say good news because the nearest dealer is over 300 miles away from my location.

Thanks again.
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Old 12-16-2014, 08:00 PM   #6
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Having a very similar problem right now. Stopped for the evening, settled in. Turned furnace on, it fired right up and ran for about 5 minutes, then shut off. It did warm the AS, but as it cooled down, the furnace did not automatically kick on. Cranked up the AC/ heat pump and it's working well. Turned thermostat up to 75 degrees when trying to get the furnace to light. No luck. Plenty of propane (water heater works and stove heats water for a cup of tea). Tanks filled before heading out on trip. Would above trouble shooting of blue wires also apply for my 06 Safari? Thanks


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Old 12-16-2014, 09:18 PM   #7
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Having a very similar problem right now. Stopped for the evening, settled in. Turned furnace on, it fired right up and ran for about 5 minutes, then shut off. It did warm the AS, but as it cooled down, the furnace did not automatically kick on. Cranked up the AC/ heat pump and it's working well. Turned thermostat up to 75 degrees when trying to get the furnace to light. No luck. Plenty of propane (water heater works and stove heats water for a cup of tea). Tanks filled before heading out on trip. Would above trouble shooting of blue wires also apply for my 06 Safari? Thanks


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It should, but Airstream might have connected different colors to the blue wires coming from your furnace.....AT the furnace. I would look inside a cabinet to see if you can find the wires and verify their color after you locate the blue ones.
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Old 12-16-2014, 10:04 PM   #8
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Update: removed front cover on furnace and discovered a switch labeled Off / Reset. Pressed reset, switched thermostat from heat pump to furnace and it fired right up. It's been cycling on/off as it should. As of right now, it's working normally. I'm in Fort Smith AR and the temps are dropping fast and will be in the high 20's over night. Will be further south tomorrow evening and not have to worry about freezing temps. Thanks Lew.


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Old 11-28-2017, 05:38 PM   #9
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I was having this exact problem--in VA mountains with temps dropping, and I checked everything. Didn't even think to open up the front of the thing! I did exactly what you did, and VOILA!!! This was the third thing to trouble me today, and I was at the end of my rope...thank you so much!!
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Old 11-29-2017, 08:47 AM   #10
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Hi Ron,

We're sorry to learn about the issue you described with your 2017 30' Classic. Please call our customer service and technical support team at*1 (877) 596-6111, option 2 so we can learn more and help.

Thanks.
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