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Old 08-30-2020, 08:03 AM   #1
NewenglandOwner
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Furnace Questions/General winter living

New to being a full timer, Just bought a 2006 Montana (model 3400RL) Furnace kicks on and the blowers push air but it won't ignite. Try it three times and the safety won't let it kick on after. Anyone have any ideas? Thinking it's the ignition box but not entirely sure how to attack it. Also happy to take any ideas other full timers have to prepare for winter. We're parked in the White Mountains and it will be a cold one. Any info will be appreciated and helpful
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Old 08-30-2020, 08:44 AM   #2
RMcNeal
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Maybe safety switch or the sail switch. Make sure there aren't any spider webs or insects in there too.
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Old 08-30-2020, 03:03 PM   #3
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Light a burner on the stove to insure the gas lines are not full of air. I think on my 06 the control board on the furnace flashes codes via an LED. The sequences of the flashes indicates the problem. Think there is a troubleshooting guide on this forum but I'll have to look for it.
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Old 08-30-2020, 03:11 PM   #4
jimcol
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Follow this link to get to manuals that have been downloaded:
https://www.montanaowners.com/forums...ad.php?t=72602

This link is specific to atwood furnace:
https://www.montanaowners.com/forums...?do=file&id=26

Good luck
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Old 08-31-2020, 10:43 AM   #5
NewenglandOwner
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Quote:
Originally Posted by jimcol View Post
Follow this link to get to manuals that have been downloaded:
https://www.montanaowners.com/forums...ad.php?t=72602

This link is specific to atwood furnace:
https://www.montanaowners.com/forums...?do=file&id=26

Good luck
Thank you! I really appreciate this! How would you go about accessing your furnace in the 06? Itís pretty well tucked away
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Old 08-31-2020, 03:42 PM   #6
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More than likely sail switch. Could be bad or plugged up with hair , or other.
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Old 08-31-2020, 03:46 PM   #7
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One of the things that caused ours to keep locking out after several retries was water under the air intake inside the unit. Could be seen when opening the outside door on the furnace. Got there during our first trip during a driving rain storm while on the road. Once I got that all dried out, it fired up.
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Old 09-09-2020, 02:17 PM   #8
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I had the same happen to me during my first winter with my 2018 Montana 3121RL, and as others above have posted, it was a faulty sail switch. The sail switch is a safety feature, so that if the blower isn't working, you don't have fire in an enclosure with no airflow. But when the switch fails (or debris gets sucked in the return air duct and prevents the switch from moving freely), then you have no ignition.
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Old 09-10-2020, 09:20 AM   #9
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In our first winter in our Montana we went to Wally World and bought two stand up Lasko heaters.
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Old 09-10-2020, 10:40 AM   #10
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Quote:
Originally Posted by TLightning View Post
In our first winter in our Montana we went to Wally World and bought two stand up Lasko heaters.
Same here. We used to use a ceramic heater in our class C but the element kept clogging with dust so we went back to an old fashioned wire coil element "milk house" heater. Between it and the electric fireplace we stay toasty even down as 28 so far. We don't run electric heat at night, we set the furnace to catch at 60. As soon as we get up we turn the electric heat back on and use the furnace to get temps back up to 70. The electric heat has had no problem holding it in the 70's during the day.



We just got caught in the freak snow storm in Colorado Springs and our system has worked well.

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