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UK Caravanning (uk.rec.caravanning) A forum for the discussion of caravanning undertaken by residents of the United Kingdom, whether in the UK or abroad. It encourages the interchange of views on the merits of models of caravan, makes of tow car, accessories, caravan sites, caravan clubs, and other related topics. The term caravan is to include trailer vans, motor caravans and trailer tents.

Fridge on 12v



 
 
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  #1 (permalink)  
Old July 13th 04, 12:05 PM posted to uk.rec.caravanning
ZZhivago
external usenet poster
 
Posts: 124
Default Fridge on 12v

When I tow and have the fridge on 12v, the fridge does not chill. I have
checked and can confirm that 12v is getting to the 12v (1.9 ohm) heating
element. Another symptom is that when the weather is warm and despite fans
I have fitted to the heater fins and running on mains, I find it difficult
to keep below 10C in the heat of the day (abroad). Has anybody any ideas
what could be the matter. The unit is 11 yrs old (Electolux RM212F), and I
wondered whether removing the fridge and inverting it might help. How often
does this need to be done, and how long do the benefits last? I should be
grateful for any help.

Cheers Paul


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  #2 (permalink)  
Old July 13th 04, 12:06 PM posted to uk.rec.caravanning
Lobby
external usenet poster
 
Posts: 6
Default Fridge on 12v

Sounds like it needs re-gasing
"ZZhivago" wrote in message
...
When I tow and have the fridge on 12v, the fridge does not chill. I have
checked and can confirm that 12v is getting to the 12v (1.9 ohm) heating
element. Another symptom is that when the weather is warm and despite

fans
I have fitted to the heater fins and running on mains, I find it difficult
to keep below 10C in the heat of the day (abroad). Has anybody any ideas
what could be the matter. The unit is 11 yrs old (Electolux RM212F), and I
wondered whether removing the fridge and inverting it might help. How

often
does this need to be done, and how long do the benefits last? I should be
grateful for any help.

Cheers Paul




  #3 (permalink)  
Old July 13th 04, 03:19 PM posted to uk.rec.caravanning
CampinGazz
external usenet poster
 
Posts: 339
Default Fridge on 12v


"Lobby" wrote in message
...
Sounds like it needs re-gasing


And where does the gas go??

There is no 'gas' in an absorbtion fridge, water, amonia, and a few other
chemicals yes, and the heat reaction from the heater elements of flame makes
it's own hydrogen.. which is a gas i guess, but you can't replace the
contents of an absorbtion fridge easily.. dunno even if anyone over here
does it.. in america they do, it's one firm for most of the country,

The turning the fridge upside down does the trick most times, because what
happens is over time amonia crystals form in the pipes, this will especialy
happen if you've run the fridge off level for some time, (the water can't
get back into the bottom of the heat riser pipe, so it boils what little
does get there, and this causes the amonia to crystalize)
If you get these crystals near the smaller pipes, they can partialy block
the flow of the hydrogen,

So turning the fridge upside down for 24 hours allows the water/amonia
solution to sit in parts that dont usually get a pure wet solution, and the
crystals can be re-absorbed into the solution,

9 out of ten times this works, i know of a few people who have bought
fridges off ebay for 10 or 20 quid, because they were sold as non working,
24 hours upside down and they were working fine again,

Try it, as long as you are competent enough to take the fridge out your
self, it'll cost you nothing but a few hours of your time,
I've got a thetford fridge in my motorhome i recently built, and their
technical people recomend the 'leave upside down a day' method for most
problems.. first thing i was told to do when i phoned up with a warrenty
claim.. my gas thermostat wasn't working properly, once i described the
fault they got me a new one and got it fitted asap.


  #4 (permalink)  
Old July 13th 04, 04:51 PM posted to uk.rec.caravanning
Tony Maris
external usenet poster
 
Posts: 161
Default Fridge on 12v

Paul,

Does the fridge work on mains and gas? if so, it is nothing do with the
absorption side of the fridge. Have you checked that the fridge is actually
drawing current? Or is there merely 12 volts there with no load applied?

Even with 12 volts at the fridge, it will not be wildly efficient and
certainly will not chill from a standing start. It needs pre-cooling on gas
or mains.

Regards

--
Tony M
Towbars & Trailers
Chesterfield
Specialists in Towing Equipment
NTTA Council Member
http://www.towitall.co.uk
QSA accredited for Towbars and Trailers



"ZZhivago" wrote in message
...
When I tow and have the fridge on 12v, the fridge does not chill. I have
checked and can confirm that 12v is getting to the 12v (1.9 ohm) heating
element. Another symptom is that when the weather is warm and despite

fans
I have fitted to the heater fins and running on mains, I find it difficult
to keep below 10C in the heat of the day (abroad). Has anybody any ideas
what could be the matter. The unit is 11 yrs old (Electolux RM212F), and I
wondered whether removing the fridge and inverting it might help. How

often
does this need to be done, and how long do the benefits last? I should be
grateful for any help.

Cheers Paul




  #5 (permalink)  
Old July 13th 04, 05:27 PM posted to uk.rec.caravanning
Lex M
external usenet poster
 
Posts: 27
Default Fridge on 12v

"CampinGazz" wrote in
:


"Lobby" wrote in message
...
Sounds like it needs re-gasing


And where does the gas go??

There is no 'gas' in an absorbtion fridge, water, amonia, and a few
other chemicals yes, and the heat reaction from the heater elements of
flame makes it's own hydrogen.. which is a gas i guess, but you can't
replace the contents of an absorbtion fridge easily.. dunno even if
anyone over here does it.. in america they do, it's one firm for most of
the country,

The turning the fridge upside down does the trick most times, because
what happens is over time amonia crystals form in the pipes, this will
especialy happen if you've run the fridge off level for some time, (the
water can't get back into the bottom of the heat riser pipe, so it boils
what little does get there, and this causes the amonia to crystalize)
If you get these crystals near the smaller pipes, they can partialy
block the flow of the hydrogen,

So turning the fridge upside down for 24 hours allows the water/amonia
solution to sit in parts that dont usually get a pure wet solution, and
the crystals can be re-absorbed into the solution,

9 out of ten times this works, i know of a few people who have bought
fridges off ebay for 10 or 20 quid, because they were sold as non
working, 24 hours upside down and they were working fine again,

Try it, as long as you are competent enough to take the fridge out your
self, it'll cost you nothing but a few hours of your time,
I've got a thetford fridge in my motorhome i recently built, and their
technical people recomend the 'leave upside down a day' method for most
problems.. first thing i was told to do when i phoned up with a warrenty
claim.. my gas thermostat wasn't working properly, once i described the
fault they got me a new one and got it fitted asap.


That sounds plausible. Thanks.

--
Hgr., Lex
http://biod.net

Posted by news://news.nb.nu
  #6 (permalink)  
Old July 13th 04, 10:39 PM posted to uk.rec.caravanning
ZZhivago
external usenet poster
 
Posts: 124
Default Fridge on 12v

Tony,

The fridge works reasonably on mains and gas, and in temperate weather it is
ok. I have now measured the current taken when on 12v (caravan battery under
charge) and this is 7.8amps. and the chimney top is too hot to touch after
about 20mins from a standing start. I always chill down on mains before a
journey. This fridge only has a small freezer compartment and I wonder if
it is not up to chilling the whole fridge when the weather is hot.
Correct me if I am wrong but I think this is all pointing to 24hrs inversion
as suggested by CampinGazz.

Cheers Paul

"Tony Maris" wrote in message
...
Paul,

Does the fridge work on mains and gas? if so, it is nothing do with the
absorption side of the fridge. Have you checked that the fridge is

actually
drawing current? Or is there merely 12 volts there with no load applied?

Even with 12 volts at the fridge, it will not be wildly efficient and
certainly will not chill from a standing start. It needs pre-cooling on

gas
or mains.

Regards

--
Tony M
Towbars & Trailers
Chesterfield
Specialists in Towing Equipment
NTTA Council Member
http://www.towitall.co.uk
QSA accredited for Towbars and Trailers



"ZZhivago" wrote in message
...
When I tow and have the fridge on 12v, the fridge does not chill. I

have
checked and can confirm that 12v is getting to the 12v (1.9 ohm) heating
element. Another symptom is that when the weather is warm and despite

fans
I have fitted to the heater fins and running on mains, I find it

difficult
to keep below 10C in the heat of the day (abroad). Has anybody any

ideas
what could be the matter. The unit is 11 yrs old (Electolux RM212F), and

I
wondered whether removing the fridge and inverting it might help. How

often
does this need to be done, and how long do the benefits last? I should

be
grateful for any help.

Cheers Paul






  #7 (permalink)  
Old July 14th 04, 03:49 AM posted to uk.rec.caravanning
Martin Edwards
external usenet poster
 
Posts: 95
Default Fridge on 12v

I have a 1981 electrolux fridge in my second van (I know, If anyone wants a
4 berth lunar in Northern Ireland make a donation to the charity of your
choice and you can have it!) anyway that fridge works on mains, but not on
gas. The flame lights fine but no cooling. will inverting it help?




  #8 (permalink)  
Old July 14th 04, 12:12 PM posted to uk.rec.caravanning
MikeS
external usenet poster
 
Posts: 62
Default Fridge on 12v


"ZZhivago" wrote in message
...
When I tow and have the fridge on 12v, the fridge does not chill. I have
checked and can confirm that 12v is getting to the 12v (1.9 ohm) heating
element. Another symptom is that when the weather is warm and despite

fans
I have fitted to the heater fins and running on mains, I find it difficult
to keep below 10C in the heat of the day (abroad). Has anybody any ideas
what could be the matter. The unit is 11 yrs old (Electolux RM212F), and I
wondered whether removing the fridge and inverting it might help. How

often
does this need to be done, and how long do the benefits last? I should be
grateful for any help.

Cheers Paul

I take it the fan is sucking air out? I agree Campingazz the turning

upsidedown of a day or so may do the trick. When you reconnect the gas use
the proper Propan/Butan sealant its red coloured can be obtianed from
caravan dealer. It used to be Electrolux brand, but now Dometic. Then use
wshing up liquid smeared over the joint. if there are no bubbles is sealed
ok use a small mirror to check behind connection.
Best of luck
MikeS


  #9 (permalink)  
Old July 14th 04, 04:46 PM posted to uk.rec.caravanning
MikeS
external usenet poster
 
Posts: 62
Default Fridge on 12v


"Martin Edwards" wrote in message
...
I have a 1981 electrolux fridge in my second van (I know, If anyone wants

a
4 berth lunar in Northern Ireland make a donation to the charity of your
choice and you can have it!) anyway that fridge works on mains, but not on
gas. The flame lights fine but no cooling. will inverting it help?


Inverting it will not help as it works on mains electricity there is nothing
wrong with its coolant circulation. But it could be the thermo-couple that
could be burnt out or a blocked jet. When was it last serviced it could need
one?
Is your fridge the type that lights with a piedso push button ignition (the
click thing), it could be that that's not working. If you have the little
window in the fridge that lets you see if the pilot light is lit. Observe to
see if it lights whilst holding the gas valve button in and if it does, does
the pilot light go out, then you take your finger away. If it goes out it
could be one of two things. The thermo-couple or the gas valve its unlikely
to be the gas valve but more than likely to the be the thermo-couple. Of
course check the jet but don't poke it with anything use and air line or
better still if it is a blocked jet buy a new one they are only pence.
MikeS


  #10 (permalink)  
Old July 14th 04, 06:16 PM posted to uk.rec.caravanning
Tony Maris
external usenet poster
 
Posts: 161
Default Fridge on 12v

Hi Paul,

If it works okay on mains and gas, inversion won't make a blind bit of
difference. The only thing that's changed is the heat source that activates
the cooling process.

The expert on fridges is Michael Leete of Dometic, and he occasionally has a
look in at URC. I would suggest you ask for Michael's advice, and I know he
used to have an FAQ for fault finding on fridges posted somewhere.

I hope this helps.

Regards

--
Tony M
Towbars & Trailers
Chesterfield
Specialists in Towing Equipment
NTTA Council Member
http://www.towitall.co.uk
QSA accredited for Towbars and Trailers



"ZZhivago" wrote in message
...
Tony,

The fridge works reasonably on mains and gas, and in temperate weather it

is
ok. I have now measured the current taken when on 12v (caravan battery

under
charge) and this is 7.8amps. and the chimney top is too hot to touch after
about 20mins from a standing start. I always chill down on mains before a
journey. This fridge only has a small freezer compartment and I wonder if
it is not up to chilling the whole fridge when the weather is hot.
Correct me if I am wrong but I think this is all pointing to 24hrs

inversion
as suggested by CampinGazz.

Cheers Paul

"Tony Maris" wrote in message
...
Paul,

Does the fridge work on mains and gas? if so, it is nothing do with the
absorption side of the fridge. Have you checked that the fridge is

actually
drawing current? Or is there merely 12 volts there with no load

applied?

Even with 12 volts at the fridge, it will not be wildly efficient and
certainly will not chill from a standing start. It needs pre-cooling on

gas
or mains.

Regards

--
Tony M
Towbars & Trailers
Chesterfield
Specialists in Towing Equipment
NTTA Council Member
http://www.towitall.co.uk
QSA accredited for Towbars and Trailers



"ZZhivago" wrote in message
...
When I tow and have the fridge on 12v, the fridge does not chill. I

have
checked and can confirm that 12v is getting to the 12v (1.9 ohm)

heating
element. Another symptom is that when the weather is warm and despite

fans
I have fitted to the heater fins and running on mains, I find it

difficult
to keep below 10C in the heat of the day (abroad). Has anybody any

ideas
what could be the matter. The unit is 11 yrs old (Electolux RM212F),

and
I
wondered whether removing the fridge and inverting it might help. How

often
does this need to be done, and how long do the benefits last? I

should
be
grateful for any help.

Cheers Paul








 



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