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Ranco k series thermostat

I got a 2nd hand Haier mini fridge (HSE02WNAWW) to make cheese. Higher temp goes to 44F... and I need something between 50-60F. I opened the knob temp control box inside the fridge and saw the thermostat is a Ramco (not sure what model because it has printed K50, K52, K60, etc, so it one of the K series). I saw is has a little silver piece of tape covering 2 screws. The head of one is just above the surface as normal and the other is inside but there is a little hole so you can reach it with a screwdriver. My question is what of these 2 screws should I tight/loose to increase/get the temperature I need (50-60F)? I would really apprreciate any light about it. You can reply to

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This thermostat is no longer available so be careful. Not knowing the workings though why not the direct approach. Adjust one screw in one direction (my guess is ccw) and see what temp changes. I would think the two screws are for high and low limits. If you cant get it higher (with knob at max) try the other direction first and then the other screw.... good luck.

Posted on May 17, 2014


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Posted on Jan 02, 2017

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SOURCE: How do I remove cover from fridge temperature control panel?

lever off the thermostat knob and you will often find fixing screws behind. also, fixing screws are often hidden behind little blanking plugs which lever out to expose the screw head

Posted on Jul 21, 2008

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SOURCE: Haier mini fridge thermostat confusion (which is cold)

Max means colder.

Posted on Sep 02, 2009

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SOURCE: I have a True GDM-10


Thank you for choosing FixYa. I wanted to ask quickly, why are you using a Ranco temperature controller? According to the manual for this refridgerator (available here even though it doesn't have the model listed, this is what I got every time I searched for this model, so I'm assuming it's the same) on page 20, there is a procedure for altering the internal temperature.

You will need a philips screwdriver, a 5/64" or 2mm allen wrench, and a T-7 torx wrench (all available at home depot, etc). You'll need to alter the temperature by a +20 on the low end, and +33 on the high end. These are referred to cut out and cut in temperatures, respectively. Follow the instructions on the manual to remove the temperature control. Each quarter turn increases the temperature by 2 degrees, to to increase your cut out temperature (the low end) to 50 degrees, you'll need to turn the allen screw clockwise 10/4 turns, or 5 full revolutions. Likewise for the cut in temperature (the high end), turn the T-7 torx screw 6 full revolutions clockwise, followed by a quarter turn (to increase to 67). If you want it up to 68, give it another 1/8 turn.

You can fine tune the temperature (with a little bit of effort and time) by replacing the temperature module then using a digital thermometer to measure the temperature. If it's outside the bounds of your needs, take the temperature control back out and tweak the controls a bit. Clockwise is warmer, anti-clockwise is colder.

I don't know if this actually solves your problem or is impossible for you, but I wanted to let you know in case you weren't aware that this model has a built-in functionality for altering the temperature. The issue you're running into is that constant cycling of the compressor without allowing it to defrost every now and then is very harmful to the system and can end up burning out your compressor, leaving you with very costly repairs.

Also take a look at this document. It is a technical service document for GDM models, and may contain some very good information. It sounds like you are fairly mechanically inclined, so I don't believe that you should have any trouble following the instructions.

Hopefully I could help, let me know if there's anything I didn't answer or anything else I can tell you!


Posted on Jul 26, 2011

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