Jump to content


Photo
* * * * - 1 votes

Furnace won’t spark

Heater Furnace

  • Please log in to reply
46 replies to this topic

#41 Jack

Jack

    Senior Member

  • Members
  • 334 posts
  • LocationPortland OR

Posted 09 March 2021 - 08:26 PM

Looks like we have been lucky, but we have camped at 8500' without furnace problems - but the duct hose in our Fleet is offset by only about an inch or so.

 

Taping two vent slots allows us to direct the heat at our feet which provides nice warmth in the front dinette. At night we direct the air flow up to the bed, which makes for a noticeably warmer sleeping area.

 

Vent.jpg


Edited by Jack, 09 March 2021 - 08:27 PM.

  • 1

2015 Fleet on 2019 Ranger


#42 Dphillip

Dphillip

    Senior Member

  • Members
  • 107 posts
  • LocationOmaha Nebraska

Posted 08 April 2021 - 12:39 PM

The furnace in our 2015 Hawk has always been unreliable, sometimes working flawlessly and sometimes failing to turn on leaving us cold and miserable during the night. I preformed  the aluminum foil duct tube adjustment many members have suggested and actually cut and removed approximately 6 inches of excess duct tube. I’m pleased to report that after a 10 day trip to Moab where we had some chilly nights and mornings our furnace worked perfectly and never failed to light. It’s amazing how something so aggravating can have a simple and cost free solution. Thanks to all who suggested this!


  • 0
Omaha Nebraska

#43 Charlie

Charlie

    Advanced Member

  • Members
  • PipPipPip
  • 47 posts
  • LocationSugarloaf, Colorado

Posted 12 April 2021 - 02:09 AM

Man, I just can’t understand why the foil hose could have any connection with the furnace not starting. The flame/exhaust side of the furnace HAS to be completely isolated from the warm air side, otherwise you would be asphyxiating your self. But I can’t argue with the reported evidence. Maybe someone can explain why this fix works?


  • 0

#44 patrkbukly

patrkbukly

    Senior Member

  • Members
  • 210 posts
  • LocationFairplay, CO

Posted 12 April 2021 - 02:26 AM

Man, I just can’t understand why the foil hose could have any connection with the furnace not starting. The flame/exhaust side of the furnace HAS to be completely isolated from the warm air side, otherwise you would be asphyxiating your self. But I can’t argue with the reported evidence. Maybe someone can explain why this fix works?

I am right with you here. I would like to understand that myself.


  • 0

#45 larryqp

larryqp

    Senior Member

  • Members
  • 297 posts
  • LocationFull-time RVer, anywhere USA

Posted 12 April 2021 - 02:15 PM

I was recently camped in the Springs Mts outside Las Vegas, in my 2019 hawk, not sure of altitude but probably over 7000 ft. When the temperature dropped, I turned on the furnace. It cycled but did not spark. I moved the thermostat switch to off and back on, it cycled but didn't spark, then cycled off. I left it set at 50 degrees, it was about 30 degrees outside. In the middle of the night I woke up to a warm camper, the furnace ran fine in the morning. This is the second time I have had intermittent problems. I suspect the sail switch is sticking and then after a number of cycles it unsticks.

 

So I'm wondering if some sort of lubricate on the sail switch might help. My concern would be the lubricate attracting dust and therefore making the switch stick more.

Any thoughts?


  • 0

2016 F150, FX4, XLT super cab

2019 FWC Hawk Shell

2009 Ford Ranger 4x4, XLT, Supercab total loss on 7/30/19

2014 FWC Shell total loss on 7/30/19

Towed behind our home which is a 2005 Kountry Star Diesel Pusher


#46 Dphillip

Dphillip

    Senior Member

  • Members
  • 107 posts
  • LocationOmaha Nebraska

Posted 16 April 2021 - 12:20 PM

I’m certainly no expert when it comes to the camper furnace but here is what I’ve experienced.

When my furnace would cycle and not light I referred to the WW forum and the 4WC facebook page. I learned about removing and cleaning the sail switch. I carefully removed mine and found there is not much to it. Just a small inexpensive switch housed in a metal enclosure with a little tab sticking out that acts as the sail. When the furnace fan kicks on the wind from the fan flips the tab and throws the switch. My switch was very clean and there is no way to lubricant or modify the switch. 

When this didn’t correct my intermittent furnace problem I tried re-routing the foil duct tube. I had read that if there is any restriction in the foil tube the wind generated by the furnace fan will not exit the furnace properly and will prevent the sail switch from tripping. I was skeptical but gave it a try and removed about 6 inches of foil duct. This to my surprise solved my problem.


  • 0
Omaha Nebraska

#47 patrkbukly

patrkbukly

    Senior Member

  • Members
  • 210 posts
  • LocationFairplay, CO

Posted 16 April 2021 - 12:31 PM

I’m certainly no expert when it comes to the camper furnace but here is what I’ve experienced.

When my furnace would cycle and not light I referred to the WW forum and the 4WC facebook page. I learned about removing and cleaning the sail switch. I carefully removed mine and found there is not much to it. Just a small inexpensive switch housed in a metal enclosure with a little tab sticking out that acts as the sail. When the furnace fan kicks on the wind from the fan flips the tab and throws the switch. My switch was very clean and there is no way to lubricant or modify the switch. 

When this didn’t correct my intermittent furnace problem I tried re-routing the foil duct tube. I had read that if there is any restriction in the foil tube the wind generated by the furnace fan will not exit the furnace properly and will prevent the sail switch from tripping. I was skeptical but gave it a try and removed about 6 inches of foil duct. This to my surprise solved my problem.

Thats good enough of an explanation for me.

thank you for that.


  • 0





Also tagged with one or more of these keywords: Heater, Furnace

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users