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09-20-2008, 05:58 PM
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#1
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Winnie-Wise
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 263
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A couple days ago my Suburban furnace decided to quit. After applying my tremendous powers of logic, I came to the conclusion it was the sail switch or something else..
I tried to take the back cover off but it was awfully tight and I didn't want to tempt the 'oh darn' gods so I called a local mobile RV service here in Ogden.
He showed up and after muscling the cover, it finally came off. A quick glance indicated the screws holding the switch were gone.
He wired it back into place and all is well. I will get a couple screws in it after we get home in a cupple weeks.
__________________
Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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09-20-2008, 05:58 PM
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#2
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Winnie-Wise
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 263
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A couple days ago my Suburban furnace decided to quit. After applying my tremendous powers of logic, I came to the conclusion it was the sail switch or something else..
I tried to take the back cover off but it was awfully tight and I didn't want to tempt the 'oh darn' gods so I called a local mobile RV service here in Ogden.
He showed up and after muscling the cover, it finally came off. A quick glance indicated the screws holding the switch were gone.
He wired it back into place and all is well. I will get a couple screws in it after we get home in a cupple weeks.
__________________
Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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09-22-2008, 07:26 AM
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#3
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Winnebago Owner
Join Date: Aug 2005
Location: Seattle, WA
Posts: 195
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Glad you fixed your problem, but my concern would be where did those screws go? if they are rolling around someplace could they get caught in the fan?
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rvcarpenter
Seattle, WA
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09-22-2008, 07:40 AM
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#4
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Winnie-Wise
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 263
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I thought about that later myself. I will look for them when we return home but they are so small (2-56 or 4-40) I won't get too worried.
__________________
Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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09-22-2008, 09:22 AM
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#5
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Winnebago Owner
Join Date: Aug 2005
Location: Seattle, WA
Posts: 195
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If I remember correct the sail switch is down stream from the fan at the out let of the furnace. So hopefully you'll be ok
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rvcarpenter
Seattle, WA
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09-22-2008, 09:33 AM
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#6
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Winnebago Owner
Join Date: May 2005
Posts: 58
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Need to pull the outside cover of the furnace also but it would not come off. So what was the trick to muscling the cover off?
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Jim & Gloria
2002 Brave 34D
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09-22-2008, 10:38 AM
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#7
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Winnie-Wise
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 263
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Take out the 4 screws. Then it is held by the slip fit of the two air tubes. They just pull out so you wiggle it until it breaks free.
__________________
Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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09-22-2008, 12:37 PM
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#8
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Winnebago Owner
Join Date: Sep 2007
Location: Ann Arbor Michigan
Posts: 224
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Would there be any possibility of some pictures? And.....what the heck is a sail switch? 
__________________
[SIGPIC][/SIGPIC] 2005 Suncruiser Banks Powerpack
Chocolate lab (Buster) 2007 Jeep Wrangler
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09-22-2008, 01:05 PM
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#9
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Winnie-Wise
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 263
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No pictures but the sail switch is a microswitch mounted at the opening of the air plenum. It has a blade (sail) that catches the air when the fan is on. It then tells the control system the fan is active and allows the gas valve to open and be ignited. Purely a necessary safety switch.
I was surprised at how open the furnace is and how easy it is to service. OBTW, mine is the SF-42 version.
__________________
Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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09-23-2008, 04:45 AM
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#10
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Winnebago Owner
Join Date: Sep 2007
Location: Ann Arbor Michigan
Posts: 224
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Is the sail switch that you speak of mounted on the outside panel of the furnace (In my case above the hitch in the back of the coach) or is the "air plenum" that you mentioned on the inside of the coach? I am assuming that someday soon my furnace will give up the ghost and it is always nice to be forearmed. 
__________________
[SIGPIC][/SIGPIC] 2005 Suncruiser Banks Powerpack
Chocolate lab (Buster) 2007 Jeep Wrangler
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09-23-2008, 04:56 AM
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#11
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Winnie-Wise
Join Date: Nov 2003
Location: Mesa, AZ USA
Posts: 263
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Yes Bill. The furnae on mine is also above the hitch. All components are in that panel and the sail switch is very visable.
__________________
Wretched excess is just barely enough.
2002 Itasca Suncruiser - WH Chassis - 35U - 2006 Jeep Liberty
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09-23-2008, 12:54 PM
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#12
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Winnebago Owner
Join Date: Sep 2007
Location: Ann Arbor Michigan
Posts: 224
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__________________
[SIGPIC][/SIGPIC] 2005 Suncruiser Banks Powerpack
Chocolate lab (Buster) 2007 Jeep Wrangler
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