Suburban SF-30 furnace [message #99472] |
Sun, 12 September 2010 17:36 |
carnutbill
Messages: 65 Registered: February 2004 Location: Rochester N.Y.
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My 2 year old Suburban SF-30 gas furnace stop working, I have a full propane tanks & gas is getting to furnace. I have 2 20 pound tanks in the propane compartment. It worked once but now it runs for 20 seconds & shuts down. any suggestions? thanks bill
75 pb
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Re: Suburban SF-30 furnace [message #99478 is a reply to message #99472] |
Sun, 12 September 2010 18:35 |
rwbmitiopt@comcast.net
Messages: 189 Registered: April 2005
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Bill
My Suburban is obstinate after it's been sitting for a month or more. I think it may be that the propane has leaked down or lost it's kindling point (if that's possible). I usually run the stove burners for a few minutes and give it another try. Has worked every time so far. BTW my furnace is about 4 years.
JWID
Randall
carnutbill wrote on Sun, 12 September 2010 15:36 | My 2 year old Suburban SF-30 gas furnace stop working, I have a full propane tanks & gas is getting to furnace. I have 2 20 pound tanks in the propane compartment. It worked once but now it runs for 20 seconds & shuts down. any suggestions? thanks bill
75 pb
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Randall Burns
Sammamish WA
75 EX GB
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Re: Suburban SF-30 furnace [message #99479 is a reply to message #99472] |
Sun, 12 September 2010 18:36 |
zhagrieb
Messages: 676 Registered: August 2009 Location: Portland Oregon
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Any chance some of your air vents are blocked causing the furnace to overtemp and shut down?
Glenn
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
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Re: Suburban SF-30 furnace [message #99482 is a reply to message #99479] |
Sun, 12 September 2010 19:12 |
rwbmitiopt@comcast.net
Messages: 189 Registered: April 2005
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Bill
For clarification: is the furnace lighting or is it just the fan running? In other words, is the fan running, not senseing heat, and shutting down. That is what I read into your original post and hence my above reply.
Randall
Glenn Giere wrote on Sun, 12 September 2010 16:36 | Any chance some of your air vents are blocked causing the furnace to overtemp and shut down?
Glenn
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Randall Burns
Sammamish WA
75 EX GB
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Re: Suburban SF-30 furnace [message #99495 is a reply to message #99493] |
Sun, 12 September 2010 21:23 |
rwbmitiopt@comcast.net
Messages: 189 Registered: April 2005
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Bill
I'm using the new 20# tanks in my coach with only the above mentioned issue.. Does the stove light? Are the furnace and stove on the same line?
Randall
carnutbill wrote on Sun, 12 September 2010 19:01 | It sounds like the furnace purges, then does not light, then times out because it doesn't see fire & shuts down.
Do the new style propane tanks with safety valves have too little pressure? bill
75pb
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Randall Burns
Sammamish WA
75 EX GB
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Re: Suburban SF-30 furnace [message #99525 is a reply to message #99495] |
Mon, 13 September 2010 06:35 |
Rodney Hamilton
Messages: 24 Registered: August 2005
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I too have a SF-30 now 5 years old, on the second season I had to pull the unit to clean/adjust the ignitor/flame sensor. And it's time again to do it. I can tell because the unit won't start unless I restrict the air into the combustion chamber by partially covering the inlet outside the coach. The unit will start and run as long as I reduce the air flow... time to adjust the ignitor/flame sensor.
A real bugger to extract from under the sink. This time around I'm going to cut an access lid into the top of the furnace so that I can clean and adjust the unit in place.
rwbmitiopt wrote on Sun, 12 September 2010 22:23 | Bill
I'm using the new 20# tanks in my coach with only the above mentioned issue.. Does the stove light? Are the furnace and stove on the same line?
Randall
carnutbill wrote on Sun, 12 September 2010 19:01 | It sounds like the furnace purges, then does not light, then times out because it doesn't see fire & shuts down.
Do the new style propane tanks with safety valves have too little pressure? bill
75pb
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Rodney Hamilton
Late 76 PB, 455
Montreal Canada
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Re: Suburban SF-30 furnace [message #99631 is a reply to message #99585] |
Mon, 13 September 2010 20:05 |
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mike miller
Messages: 3576 Registered: February 2004 Location: Hillsboro, Oregon
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carnutbill wrote on Mon, 13 September 2010 10:06 | ... I have the unit out & connected on the bench & it still doesn't work. The flame lights for a second & then goes out.
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Sounds like something in your "flame sensing curcuit."
The sensor is on the same assembly as the "sparker."
There is a manual on bdub's site for the correct part names and correct set up.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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