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12-01-2022, 03:14 PM
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#1
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Senior Member
Join Date: Oct 2012
Posts: 363
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Furnace Problem
We have a problem with our Furnace. It starts and fires up with no problem, But after a few minutes the Burner goes off, But the fan keeps running and does not stop as it would if upto temp.
If turn it off and try again it does the same, Burner for a few minutes then heat off and fan goes on running.
We have gauze over inlet / outlet so there can not be any beasties in the cage. And the safety temp at rear of burner was replaced last service we gave it.
Any help appreciated
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Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-01-2022, 03:39 PM
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#2
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Jun 2016
Location: On the continental divide
Posts: 1,495
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If you turn your thermostat up 10 degrees, will it keep cycling ?
Mike in Colorado
__________________
2004 Fleetwood Pace Arrow 37c, 8.1 gasser, (Jezebel) Ultra RV ECM / TCM and rear track bar, PPE deep Tx pan, Bilstein's, Sailun's & Sumo's all round, pushed by a 2002 Grand Caravan, on a Master Tow Dolly.
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12-01-2022, 04:45 PM
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#3
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Senior Member
Join Date: Oct 2012
Posts: 363
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Quote:
Originally Posted by Flyer15015
If you turn your thermostat up 10 degrees, will it keep cycling ?
Mike in Colorado
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Tried it on various temp settings. Starts, fires up then a few minutes burner stops. Did once relight then went off again.
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Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-01-2022, 05:16 PM
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#4
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Member
Join Date: Sep 2022
Posts: 47
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Have you ever ran out of propane with the furnace running? Maybe air pockets?
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2008 Northwood Nash 19B
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12-01-2022, 09:30 PM
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#5
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Senior Member
Join Date: Nov 2015
Posts: 23,653
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Sail Switch is dropping out...Opening
No DC to controls for flame ignition
Screens on Intake/Exhaust can affect airflow for combustion
__________________
I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
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12-01-2022, 09:31 PM
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#6
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Jun 2016
Location: On the continental divide
Posts: 1,495
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D. U.
First confirm you have LP. Then light a stove burner the confirm that there is gas in the line. Does the water heater work properly on LP?
Set your thermostat to 70, or as high as it will go and try it again.
Let us know the results.
Mike in Colorado
__________________
2004 Fleetwood Pace Arrow 37c, 8.1 gasser, (Jezebel) Ultra RV ECM / TCM and rear track bar, PPE deep Tx pan, Bilstein's, Sailun's & Sumo's all round, pushed by a 2002 Grand Caravan, on a Master Tow Dolly.
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12-01-2022, 10:52 PM
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#7
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Senior Member
Join Date: Apr 2018
Posts: 2,583
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Maybe the high limit snap disc is thinking it's overheated, that would keep the fan running.
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12-02-2022, 04:29 AM
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#8
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Senior Member
Join Date: Oct 2012
Posts: 363
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Quote:
Originally Posted by THeGAME
Have you ever ran out of propane with the furnace running? Maybe air pockets?
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Plenty of lpg.
__________________
Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-02-2022, 04:30 AM
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#9
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Senior Member
Join Date: Oct 2012
Posts: 363
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Quote:
Originally Posted by Old-Biscuit
Sail Switch is dropping out...Opening
No DC to controls for flame ignition
Screens on Intake/Exhaust can affect airflow for combustion
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Screens have been on since we bought her. Going to take unit out and check.
__________________
Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-02-2022, 04:31 AM
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#10
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Senior Member
Join Date: Oct 2012
Posts: 363
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Quote:
Originally Posted by shootist
Maybe the high limit snap disc is thinking it's overheated, that would keep the fan running.
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Not sure what you would call a SnapDisc ?
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Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-02-2022, 04:33 AM
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#11
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Senior Member
Join Date: Oct 2012
Posts: 363
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Quote:
Originally Posted by Flyer15015
D. U.
First confirm you have LP. Then light a stove burner the confirm that there is gas in the line. Does the water heater work properly on LP?
Set your thermostat to 70, or as high as it will go and try it again.
Let us know the results.
Mike in Colorado
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All other appliances seem fine. Will take unit out and see if anything untoward can be seen
__________________
Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-02-2022, 07:49 AM
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#12
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Senior Member
Workhorse Chassis Owner
Join Date: Sep 2017
Posts: 1,503
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The "snap disc" is the high limit switch. Never heard it called a "snap disc". It is a limit switch that turns off the burner if the furnace overheats. If the limit switch open the control board turns off gas to the furnace but the fan keeps running for a while.
You haven't said what the brand and model of your furnace is. The furnaces sorta operate the same regardless of brand but if we knew the furnace brand it may help get relevant information.
__________________
2003 34' Georgetown on W20 Workhorse Chassis. UltraRV power mods. Doug Thorley Headers and MagnaFlow 12589 mufflers. Front Sumo Springs, Rear P32 Sumo Springs, UltraRV Track Bar.
1998 Jeep Toad.
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12-02-2022, 10:35 AM
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#13
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Senior Member
Join Date: Oct 2012
Posts: 363
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Quote:
Originally Posted by yeloduster
The "snap disc" is the high limit switch. Never heard it called a "snap disc". It is a limit switch that turns off the burner if the furnace overheats. If the limit switch open the control board turns off gas to the furnace but the fan keeps running for a while.
You haven't said what the brand and model of your furnace is. The furnaces sorta operate the same regardless of brand but if we knew the furnace brand it may help get relevant information.
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Thank you. It's a Suburban
__________________
Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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12-02-2022, 10:40 AM
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#14
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Senior Member
Join Date: Oct 2012
Posts: 363
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Todays update.
Took front cover off and unit is clean. Fired it up and it ran then seemed to back fire ( but more of splut ) then burner off, after a short while fired up and then ran, burner ofc, burner on But fan constantly on.
So thought was working as should.
Tried it again later and it fired up, then burner off and blowing tepid air, do back to square one.
Thinking of getting another heat/ safety switch which goes on back of furnace again.
__________________
Fleetwood Bounder 34J
1999 V10 Triton
Based in the UK
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