Sooty fridge

Nov 6, 2013
3,138
122,871
East Sussex
Funster No
28,906
MH
Hymer B574DL
Exp
7 years (tugger for 20)
Hi all,
I recently had to replace the burner in my Dometic RM7361 fridge as it was very rusty and not igniting properly. I gave it a try for a couple of days on the drive and all was fine.:thumb:
We have just returned from a very nice week in Somerset and after the first day the fridge flu showed signs of sooting.:Sad: I removed the burner again and found loads of stuff(rust?), cleared it and all was well again.:thumb: Then on the 3rd day the soot was bad, staining the side of the van above the flu.:Eeek: Needless to say at that point I turned it off. :Blush:
Can anybody shed any light on the problem?
Thanks
John
 

JJ

Funster
May 1, 2008
18,188
40,176
Quinta Majay, Pinheiro Bordalo, Portugal
Funster No
2,459
MH
A Class
Exp
over 40 years
My first thoughts are that the soot is caused by the burner not burning with a nice BLUE flame.

Possibly a yellowish flame?

Maybe need a new jet... or at least cleaned out with a bit if compressed air. May be some tiny flecks of rust fell on top of it.

Others will no doubt know more.

JJ :Cool:
 
Last edited:

pappajohn

LIFE MEMBER
Aug 26, 2007
39,305
35,594
Dark side of the moon
Funster No
172
Exp
Since 2005
sounds like someone with no knowledge has been cleaning out the jet with a bit of wire or a pin/needle and opened the orifice slightly causing a rich mixture.....it doesnt take much !

NOTHING should be inserted in a jet unless you know the EXACT jet size and have a correspondingly sized jet probe....and even then its a last resort..

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funflair

LIFE MEMBER
Dec 11, 2013
14,570
18,626
Guisborough
Funster No
29,351
MH
MORELO palace
Exp
since 2012
The stuff (rust) must have dropped from the chimney/flue I cleaned ours out recently and cleaned the burner assembly without touching the jet, I got into the flue by the top vent and removed the twisted baffle I then cleaned the flue with scotchbrite pad pushed down with some stiff wire, cover the burner when you do this or you will fill it with the soot etc..

Mine works fine now so best of luck with yours.

Martin
 

Tootles

Funster
Deceased RIP
Sep 14, 2013
9,512
34,790
Lancaster
Funster No
28,093
MH
Coachbuilt
Exp
Was a newbie, now a Middie.
sounds like someone with no knowledge has been cleaning out the jet with a bit of wire or a pin/needle and opened the orifice slightly causing a rich mixture.....it doesnt take much !

NOTHING should be inserted in a jet unless you know the EXACT jet size and have a correspondingly sized jet probe....and even then its a last resort..

You can use the bristle off a paint brush.....:thumb:
 
Oct 29, 2008
4,208
3,779
West Yorkshire
Funster No
4,712
MH
PVC
Exp
since 2008
On many of the motorhome fridges there is a design fault. The condensate from the back of the fridge comes down the plastic tube fills the plastic reservoir then runs down the gas pipe causing the jet to get fouled. I put an external drain tube out the external vent so mine now drips outside.
 

GJH

LIFE MEMBER
Aug 20, 2007
28,637
36,138
Acklam, Teesside, originally Glossop
Funster No
127
MH
Burstner t625 Harmony
Exp
Since 2006
You know G, when your lurking in the virtual ooloo, no post is safe from your rapier sharp attack...........:cry:

It's relief Dave. I've had to go to Glossop four times in the last fortnight - and survived :roflmto:

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OP
Baycott
Nov 6, 2013
3,138
122,871
East Sussex
Funster No
28,906
MH
Hymer B574DL
Exp
7 years (tugger for 20)
Thanks all for your input, comic :ROFLMAO: and serious:thumb:, it is much appreciated.
A new jet has been ordered and I will get it checked professionally after fitting.
John.
 

Plumberman

Free Member
Sep 29, 2013
66
39
West Midlands.
Funster No
28,335
MH
A Class
Exp
I'm Learning
Hi Baycott,
Your problem suggests improper combustion due to incorrect mixture of gas and air.
LPG is a dangerous gas and I would seek professional advice from a qualified engineer .
Could be a simple problem of a blocked injector/pilot/burner.
A qualified engineer will soon sort your problem.
Hope this helps.:thumb:

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