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12-27-2022, 03:06 PM
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#1
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 1,761
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Grrrr furnace
An RV furnace is the most frustratingly unreliable abomination devised by mankind. Just had to say that.
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-jbh-
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12-27-2022, 04:18 PM
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#2
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Community Administrator
Pond Piggies Club LA Gulf Coast Campers Outdoors RV Owners Club Entegra Owners Club Skyline Owners Group
Join Date: Mar 2002
Posts: 38,096
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Uh, ok. Are you needing assistance with something?
I've had RV furnaces in RV's for 22 years & none gave me problems. Maybe I was just lucky.
__________________
Lori (& Dave, my spirit guide) - FMCA #F419886 | RV/MH Hall of Fame Lifetime Member
2016 Phoenix Cruiser 2350S & 2014 CRV EX-L AWD, My iRV2 Photo Albums
2018 Phaeton 40IH,2006 Bounder 36Z, 2004 Cougar 285EFS, 2000 Aerolite 25FBR
There is great need for a sarcasm font. 
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12-27-2022, 04:35 PM
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#3
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 10,901
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They really are kind of dumb animals if no installations problems such as bad connections or plugged up intake by wasps etc.
They are usually easy enough to diagnose.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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12-27-2022, 05:06 PM
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#4
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Senior Member
Join Date: May 2021
Location: Brenham, Texas
Posts: 1,515
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Quote:
Originally Posted by johnhicks
An RV furnace is the most frustratingly unreliable abomination devised by mankind. Just had to say that.
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I’ve not had any furnace problems, but I’ll agree with you that if you have trouble, it can be the most frustratingly unreliable abomination devised by mankind.
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Eddie and Jomaye, Retired
2018 Newmar Ventana 4369
2021 Jeep 4 dr Wrangler
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12-27-2022, 05:11 PM
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#5
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Senior Member
Join Date: Nov 2015
Posts: 24,060
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Quote:
Originally Posted by NLOVNIT
Uh, ok. Are you needing assistance with something?
I've had RV furnaces in RV's for 22 years & none gave me problems. Maybe I was just lucky.
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We must have the same luck with them
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
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12-27-2022, 06:31 PM
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#6
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 1,761
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The furnace was working fine in November and early December, but when the deep freeze came...
I think it's the board, which is 29 years old. Always fires but intermittently sustained. Limit switch has been replaced, flame sensor unknown. The plan is to go ahead and replace the board anyway.
I had one of those GasStop gizmos between the MH tank and the regulator; it shut down three times the other night so it's gone.
__________________
-jbh-
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12-27-2022, 06:51 PM
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#7
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Senior Member
Join Date: Feb 2020
Location: NY State
Posts: 2,171
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Quote:
Originally Posted by NLOVNIT
Uh, ok. Are you needing assistance with something?
I've had RV furnaces in RV's for 22 years & none gave me problems. Maybe I was just lucky.
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You were lucky. They're pretty reliable but intermittent control board problems can induce insanity.
I'm in recovery. I think.
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John
1976 Southwind 28', '96 Winnie 34WK,
2006 Tiffin Allegro Bus 40QDP
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01-20-2023, 09:43 PM
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#9
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 1,761
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Dinosaur board didn't fix it but since I wanted a spare board anyway no money lost. Ignitor/flame sensor next.
__________________
-jbh-
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01-21-2023, 09:19 AM
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#10
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 10,901
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Have you used a voltmeter on the positive and then the negative wires going into the furnace when it is trying to run.
The load from the fan blower is high and a poor connection along the way along with cold batteries is a recipe for low voltage which can cause all kinds of strange problems.
Your furnace initially firing could be surface charge on the battery being high enough to overcome bad wiring. Once the furnnace fires and is running and then goes off, then recycles on again it might not be enough voltage to satisfy it.
You need a good ground for your voltmeter so run one from the battery or a nearby shiny place that works.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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01-21-2023, 09:35 AM
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#11
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RV Mutant #14
Winnebago Owners Club Texas Boomers Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Aug 2008
Location: Texas
Posts: 16,734
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Quote:
Originally Posted by johnhicks
An RV furnace is the most frustratingly unreliable abomination devised by mankind. Just had to say that.
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I ran out of propane once and the furnace would not work.
Most likely it was my problem and not the furnace.
Sorry, couldn't resist.
__________________
Wayne MSGT USMC (Ret) & Earlene (CinCHouse) RVM14 (ARS: KE5QG)
Lexi - Goldendoodle
2015 Winnebago Tour 42QD - 2020 Lincoln Nautilus Reserve
It is what it is, and then it is what you make of it.
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01-22-2023, 03:41 PM
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#12
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Senior Member
Join Date: Mar 2019
Location: Myrtle Beach
Posts: 1,107
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Our Thor has had furnace problems since our first trip in 2016. It rained. The exterior cover was configured incorrectly so the board got wet. Had to use a hair dryer to dry it. That went on the entire trip. Returned home to find a recall on the incorrectly configured cover. Replace cover. That helped unless it was a hard rain and board would get wet.
On our fall trip north it failed completely. We used space heaters the entire trip. A new board has been ordered and installed. I have no idea how long it will last.
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Big enough, DH, me and the greys!
2016 Thor ACE, 30.1.
2014 CRV
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01-22-2023, 05:42 PM
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#13
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 1,761
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An ignitor assembly has appeared at the post office. Onward!
__________________
-jbh-
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01-31-2023, 08:40 PM
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#14
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 1,761
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Turns out the ignitor electrodes were on the edge of being too far apart, the burner had many holes excessively restricted, and the orifice had lots of gnat carcasses trapped inside. The problem could have been one or all three. FIXED...for now. I now know what parts to have aboard and what to do with them. It will probably never give a moments problem again.
__________________
-jbh-
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