Three way fridge not working (1 Viewer)

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Jugar99

Free Member
May 4, 2019
3
4
Funster No
60,559
MH
Hymer B644
Exp
2008
I just wanted to say a big thank you for some of the constructive comments made with regards to my motorhome fridge failing to stay late after initially starting with no problem. Having done all the usual dismantling and cleaning to know avail, I picked up a tip to repeatedly rotate the selector switch 30 or more times. This is the dial that selects gas, battery, mains electricity, etc. After what must’ve been 60+ clicks of the switch… Hey presto… It is fixed. Absolutely amazing and thanks again! PS I am reliably informed that the thermocouple rarely fails with a fridge unit.
 
Feb 22, 2011
10,105
20,958
Newcastle under Lyme
Funster No
15,397
MH
Hymer B544 A Class
Exp
Since 2015
Glad it's working but I don't understand what repeatedly turning the switch will do.
You may still have a problem ?
 
Mar 10, 2016
558
617
Scotland
Funster No
41,942
MH
A Class RMB 750HE
Exp
Three years and counting, 30 years a tent tower.
The only thing I can think of is that it is cleaning the switch contacts?

Cheers

Trevor
Good chance that is exactly what it is doing. Its possible that there is some sort of corrosion build up on the contacts when unused for long periods.

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Oct 24, 2015
5,323
33,933
Helgas house
Funster No
39,736
MH
hymer e650 battered!!
Exp
None
That happens with my left elbow!!

I think I get a calcium build up on the joint, and sometimes I can’t touch my face,, but when I lay bricks or exercise it for a day, it works lovely!! Same principle I reckon!! Lol x
 

DBK

LIFE MEMBER
Jan 9, 2013
18,163
48,688
Plympton, Devon
Funster No
24,219
MH
PVC, Murvi Morocco
Exp
2013
I just wanted to say a big thank you for some of the constructive comments made with regards to my motorhome fridge failing to stay late after initially starting with no problem. Having done all the usual dismantling and cleaning to know avail, I picked up a tip to repeatedly rotate the selector switch 30 or more times. This is the dial that selects gas, battery, mains electricity, etc. After what must’ve been 60+ clicks of the switch… Hey presto… It is fixed. Absolutely amazing and thanks again! PS I am reliably informed that the thermocouple rarely fails with a fridge unit.
That's what worked on mine, it does clean the contacts which is needed I believe as the voltage from the thermocouple is tiny.

However, in the end I had to replace the switch, the fault kept returning. I stripped the faulty one down, cleaned everything but it still wouldn't work reliably but replacing it cured the problem.

Tip: Photograph the switch with all cables in place for safety then change over one wire at a time to the new switch. :)
 
OP
OP
J

Jugar99

Free Member
May 4, 2019
3
4
Funster No
60,559
MH
Hymer B644
Exp
2008
Thanks for all the comments guys. I think it does clean the contacts somehow but it may be a signal that the switch is failing. I will wait and see.
 
Oct 13, 2016
1,058
900
Grays - Essex - UK
Funster No
45,568
MH
Mercedes Hymer B680
Exp
Been moho’ing for a time now
I had a similar problem in Germany last year, and it was the switch, but just dirty contacts, so I carefully stripped the switch apart, cleaned it with brake cleaner, then a quick spray WD 40, reassembled then removed the thermostat end of the thermocouple and cleaned the contacts there, but only with brake cleaner, it now works perfectly

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Aug 6, 2013
11,980
16,599
Kendal, Cumbria
Funster No
27,352
MH
Le-Voyageur RX958 Pl
Exp
since 1999
Buy contact cleaner - the stuff that's actually called Contact Cleaner. Don't dismantle the switch just thoroughly hose ever possible entry point with the stuff. Dry it off then refit. It will not fail again and the switch doesn't wear - the contacts develop very minor corrosion through lack of work.
 

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