Fridge Repair: Adjusting the Thermostat Relay Bitr Point

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Introduction: Fridge Repair: Adjusting the Thermostat Relay Bitr Point

My girlfriend was about to throw out her fridge because it had stopped working - so I had one last chance to tinker with it.
The fridge light came on, but the cooling mechanism didn't come on (didn't cool or make any noise)

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Step 1: Examining the Thermostat

The Thermostat is inside the temperature adjustment box - I pulled off the box by hand.
The Thermostat contains an expanding copper pipe contraption, this pushed against a spring loaded metal plate.
As the pipe contraption warms, it expands against the metal plate and turns the fride on, as it cools the springs push the plate and the fride turns off.
There are a couple of screws that adjust the springs tensions, thus adjusting the temperature that that fridge starts up and turns off.

Step 2: Adjusting the Bite Point

It turns out the the plslate was moving correctly to turn off the fridge, but when moved to its most open position the fridge did not turn on.
This suggested a sticky switch, or that something had worn away on the plate not allowing the plate to quite turn the fridge on.
It turns out that a tiny set screw on the side adjusts the bite point of the plate operated switch, adjusting this resulted in the fridge working 100%

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    3 Discussions

    0
    Mandates
    Mandates

    5 weeks ago

    I need further advice. There are two screws, one which I can clearly see is spring loaded which is on the right hand side and another on the back. I’m calling the side where the dial control connects the front for this example. Which one do I adjust to move the plates so fridge turns off and on as it should?
    Mine is on pretty much constantly

    0
    JohnD953
    JohnD953

    7 months ago on Introduction

    It really worked!! Thank you so much for the instructions!! Like your girlfriend, I was about to throw my chest freezer out and get a new one. I happened to come across your information and adjusted the small screw. I reinstalled the thermostat and the compressor started working. You saved me a few hundred $$$.

    0
    Ninjabdou
    Ninjabdou

    2 years ago

    Thank you very much, that's what I was really looking for, but you should have explained the process, and also what each screw does