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Suburban+SF-30+furnace


13-09-2010 02:36 AM
1


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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13-09-2010 03:20 AM
2


My furnace would run for a given number of seconds and shut off regardless of
temperature. I replaced the thermostat and it works fine now. I think it was
cycling due to current flow through the contacts rather than temperature


Bobby & Vickie Gray

706 877-2211 or 2214








--My 2 year old Suburban SF-30 ---

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13-09-2010 03:35 AM
3


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


--
Randy Burns
Sammamish WA
75 EX GB
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13-09-2010 03:36 AM
4


Any chance some of your air vents are blocked causing the furnace to overtemp and shut down?

Glenn
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13-09-2010 04:12 AM
5


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


--
Randy Burns
Sammamish WA
75 EX GB
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13-09-2010 06:10 AM
6


I had a similar problem with my 30 and it was the wire to the thermostat. Had to run new wires.
Dan
--
Dan & Teri Gregg

http://danandteri.blogspot.com/




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13-09-2010 06:23 AM
7


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


--
Randy Burns
Sammamish WA
75 EX GB
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WORD bugger found, removing...
13-09-2010 03:35 PM
8


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


--
Rodney Hamilton
Late 76 PB, 455
Montreal Canada
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13-09-2010 03:39 PM
9


Clean the contacts in the thermostat. Very fine sand paper works.

On Sun, Sep 12, 2010 at 3:36 PM, Bill Gagnier <> wrote:
>
>
> 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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13-09-2010 09:06 PM
10


What adjustments should I make? I have the unit out & connected on the bench & it still doesn't work. The flame lights for a second & then goes out. bill

75pb
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