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09-26-2007, 12:02 PM
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#1
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2 Rivet Member
1992 30' Land Yacht
Bakersfield
, California
Join Date: Dec 2006
Posts: 36
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Dometic Refrigerator
My 1992 Dometic refrigerator, 3 way, is not operating on gas. It will light and burn for approx. 3 minutes, and go off.
The burner is clean and the flame strong and blue. The thermocouple is clean. I have also replaced the computer board with a Dinasour unit, and the problem persists.
While the unit is burning, the ingnition continues to spark at regular intervals, about every second, and continues until the flame goes out. But when the flame goes out, it will not try to ignite.
Does anyone have a clue what the problem is and how is it solved?
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09-26-2007, 12:24 PM
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#2
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Rivet Master
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia
, New Mexico
Join Date: Feb 2005
Posts: 7,743
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The good news is if it works on electric the major fridge cooling components are ok. I know more about the old ones than new but the problem should be limited to the fuel supply components: thermocouple and safety valve. The output of the thermocouple should be about 27 millivolts. There is a magnetic switch in the safety valve which can also go bad. I assume you checked the obvious, that the regulator on the tanks is OK.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
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09-26-2007, 12:40 PM
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#3
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4 Rivet Member
2012 31' Classic
1999 36' Land Yacht Widebody
Andalusia
, Alabama
Join Date: Dec 2005
Posts: 476
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We have started having a problem with ours also. It is a '97 3-way in our '86 345 Classic MH. My fridge will light with one click of the ignition, and has a perfect blue flame. After about 2 to 5 minutes, it shuts down and turns on the "check" light. It does not try any more ignition. My thermocouple puts out between 35 and 30 mv. The limit switch installed with the recall is working properly.
I have just started having this problem since the recall mod.
It works fine on 120 and 12 volts.
Rob
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09-26-2007, 12:45 PM
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#4
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Rivet Master
Join Date: Dec 2002
Posts: 1,335
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The thermistor (used as the sender unit to monitor temperature) can be checked as described in this post of mine from early 2003:
http://www.airforums.com/forums/f425...tors-3110.html
Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
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09-26-2007, 06:08 PM
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#5
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4 Rivet Member
2012 31' Classic
1999 36' Land Yacht Widebody
Andalusia
, Alabama
Join Date: Dec 2005
Posts: 476
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Update- I have pulled and reinstalled all the connectors on the board. As of this time the fridge is working fine. I have turned it on and off several times, and now it has been working for about 4 hours.
Rob
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09-27-2007, 11:55 AM
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#6
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4 Rivet Member
2012 31' Classic
1999 36' Land Yacht Widebody
Andalusia
, Alabama
Join Date: Dec 2005
Posts: 476
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My hopes have been dashed. The fridge is still screwing up. Time to take it to the shop.
Rob
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10-01-2007, 09:20 AM
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#7
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4 Rivet Member
2012 31' Classic
1999 36' Land Yacht Widebody
Andalusia
, Alabama
Join Date: Dec 2005
Posts: 476
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Streamers,
I took our coach to Fun Time Campers in Indy. They are the ones that did the recall on my fridge. They checked the unit and at first it would not screw up. (of course) Then it started the kicking out on gas. They determined that there was something loose in the board. Anytime you disturbed the board or pushed on it the unit would kick out. They did not have a 3-way board in stock, but I found one at the new Camping World on the south side of Indy. The Fun time guys just charged me a $75.00 diagnostic charge. OK with me.
I installed the new board assembly Friday afternoon. The part had been superseeded about 4 times and is now different than the old one.
The fridge worked perfectly all weekend. On gas, 12v, and 110v.
Finally, Rob
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10-01-2007, 11:03 AM
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#8
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Rivet Master
2011 34' Classic
Westchester Cty.NY
, / Miami FL
Join Date: Jul 2007
Posts: 3,122
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cool! btw, do you mind sharing the model numbers and prices?
__________________
Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
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10-01-2007, 07:04 PM
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#9
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4 Rivet Member
2012 31' Classic
1999 36' Land Yacht Widebody
Andalusia
, Alabama
Join Date: Dec 2005
Posts: 476
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I don't have the numbers with me, but my fridge is a Dometic 3-way made in 1997. The new Dometic board was about $149.00 at Camping World with my Presidents club discount.
Rob
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10-01-2007, 08:15 PM
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#10
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Rivet Master
2011 34' Classic
Westchester Cty.NY
, / Miami FL
Join Date: Jul 2007
Posts: 3,122
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thanks, i was wondering that if i had that problem, how much a guess would cost vs. a service call.
__________________
Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
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10-01-2007, 08:19 PM
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#11
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Quote:
Originally Posted by Robfike
Streamers,
I took our coach to Fun Time Campers in Indy. They are the ones that did the recall on my fridge. They checked the unit and at first it would not screw up. (of course) Then it started the kicking out on gas. They determined that there was something loose in the board. Anytime you disturbed the board or pushed on it the unit would kick out. They did not have a 3-way board in stock, but I found one at the new Camping World on the south side of Indy. The Fun time guys just charged me a $75.00 diagnostic charge. OK with me.
I installed the new board assembly Friday afternoon. The part had been superseeded about 4 times and is now different than the old one.
The fridge worked perfectly all weekend. On gas, 12v, and 110v.
Finally, Rob
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Unfortunately, most OEM control and igniter boards used in refers, furnaces, water heaters and such are NOT made to the highest standards. The prime reason for failure that I've found is the fact that the components on the board are not soldered on both sides....just the back.
This accelerates the breakage of the connections of the individual components soldered to the board, causing the board to fail prematurely. The best remedy for this condition is to buy your replacement boards from Dinosaur Electronics. They are made to military spec and are soldered thru, are much more durable and carry a 3 year warranty. And no, I have nothing to do with the company other than I use their boards as replacements every where one is applicable.
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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