Fridge overcooling!

Discussion in 'Motorhome Chat' started by MHVirgins, Jul 17, 2013.

  1. MHVirgins

    MHVirgins

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    Has anyone else had a problem with their fridge freezing items that are in the main shelved area of the fridge?

    I have already turned the control knob down slightly, but last week had a frozen cucumber, several frozen/burst tomatoes and three frozen bananas:Laughing::Laughing::Doh:

    I don't want to turn the control down any lower because the items on the shelves in the main part of the fridge were barely cold enough, but don't want any more frozen bananas either.

    Would be grateful for any advice.

    Margaret:Smile:
     
  2. Goldenoldies

    Goldenoldies Funster

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    Possibly get the thermostat checked out.
     
  3. Gromett

    Gromett Funster

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    Is it sticking on 12V? 12V is not thermostatically controlled on a lot of fridges so should only be used when driving.

    Just a thought?
     
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  4. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    If some areas of the fridge are cold enough and others are freezing you possibly have too much stuff in the fridge. For a fridge to work efficiently it needs to have a "thermosyphon" air flow. As the cooling element is mounted at the top in an absorption fridge the top will get coldest (that's why the freezer compartment is at the top as its on the same cooling circuit, not separate). the middle area should be cool but not as cold as the top and the bottom should be cool but not as cool as the middle bit. If you put too much stuff in the fridge the air cannot circulate and you end up with the higher parts overcooling while the lower areas don't cool much at all. You can also end up with some stuff frozen in the fridge area by placing at the rear of the upper shelves, this places it closest to the cooling element so it cools the most.

    D.
     
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  5. Armytwowheels

    Armytwowheels Funster Life Member

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    Very well explained, thank you. Hopefully no more frozen salad for us!
     
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  6. jonandshell

    jonandshell Funster

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    Our Thetford freezes stuff close to the element if we pack stuff in too tightly!:BigGrin:
     
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  7. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    You're welcome. A similar issue can occur in domestic 230 volt compressor fridges where the cooling element runs down the whole rear wall, placing too much on one shelf can result in the stuff at the back becoming frozen while the stuff in front is barely cool.

    D.
     
  8. MHVirgins

    MHVirgins

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    Hi Grommett, thanks for that, it only seems to get over cold when on EHU

    Margaret:Smile:
     
  9. MHVirgins

    MHVirgins

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    Hi Dave, many thanks for your reply..........I reckon there's been far too much packed into the small fridge. We tend to buy enough food for a few days at a time and end up buying too much:RollEyes:
    The cucumber and bananas had been put in the salad box at the bottom and the tomatoes were higher up.
    We're changing van next month and have a much bigger fridge and separate freezer in it, so hopefully won't have to pack too much in with that.

    Margaret
     
  10. Reallyretired

    Reallyretired Funster

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    Might not make much difference. We have the big fridge with the separate freezer, both are usually stuffed:Eeek:
     
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  11. magicsurfbus

    magicsurfbus Funster

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    Also, isn't the optimum thermostat setting the middle position on the dial? In addition to the excellent description above I'm also wondering if it's set too high.

    I bought one of those cheap LCD temperature sensors on a short lead and fitted the display into the front panel of our Dometic unit while hanging the sensor in the middle of the fridge. It helps us keep things just right.
     
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  12. icantremember

    icantremember Funster

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    We have a Thetford fridge which froze everything including my beer.... on speaking to Thetford it turned out to be a faulty thermistor (not thermostat).

    This is a small device on two wires clipped to the alloy fins at the top inside the fridge and is easily replaceable in a few seconds.

    Brian
     
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  13. Ralph-n-Bev

    Ralph-n-Bev Funster

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    I thought bananas went black if you kept them in the fridge ?
     
  14. MHVirgins

    MHVirgins

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  15. MHVirgins

    MHVirgins

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    I suggested to Bill that it was all his beers that were upsetting the temperature of the fridge:RollEyes: He likes to stick a couple of cans inside the freezer compartment for a "quick chill", especailly in this heat:Rofl1:
    Just had a look inside ours and can't see anything on the fins.


    Margaret
     
  16. icantremember

    icantremember Funster

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    This is what the thermistor looks like in our Thetford N175 fridge....

    http://www.picresize.com/popup.html?images/rsz_thermistor.jpg

    Tell Bill to put a stick in his beer cans for great beer lollipops :Wink:
     
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  17. MHVirgins

    MHVirgins

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    I wasn't able to view the image, but have just checked the fridge and there are only 8 small screws holding the metal fin part to the back of the fridge. However, ours is a Dometic, so probably different to the Thetford.
    As Dave said earlier, we've had too much food crammed into it:RollEyes:

    Thanks for your help:thumb:
    Margaret:BigGrin:
     
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  18. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    Frozen cucumber is not ideal either:Doh:

    It has its uses:Eek!:

    D.
     
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  19. Armytwowheels

    Armytwowheels Funster Life Member

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    ....and that would be what?
     
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  20. Armytwowheels

    Armytwowheels Funster Life Member

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    My mum wraps her nanas is newspaper and keeps them in the fridge, apparently they don't go black. I've never tried it, bananas are the devils food!! Yuk.
     
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