For the beginner, the pictorial diagram is the easiest to follow because it shows the various components as they actually look. A couple degrees colder or warmer, whatever you need for reaching optimal temperature. When all things perishable go bad before they're expected to, it's time to investigate. There's a lot going on in a fridge — components aplenty can all affect performance, like the coolant, condenser coils, door seals, the thermostat and even the ambient temperature in the living space. Based in Colorado Springs, Colo., Jerry Walch has been writing articles for the DIY market since 1974. © Copyright 2020 Hearst Communications, Inc. There are dangers involved in any type of do-it yourself project if the proper safety precautions are not taken. Now adjust the thermostat according to your fridge's manual specifications. If the freezer is freezing food — even if it freezes it too cold (yes, that can happen) — then that's fine because frozen is frozen, but the fridge being inconsistent and having warm pockets can lead to invisible foodborne illnesses along with things visibly spoiling too soon. There will be some cases where you will need to take live voltage readings, but this will not be one of those times. Referring to the wiring diagram, locate the wiring harness coming from the temperature control and disconnect it from the terminal board in the compressor compartment. One jug of milk turning sour before its "best by" date is bad luck, but a pattern of sour-too-soon milk indicates something's going wrong. In some cases that manufacturer provides that wiring diagram in two formats — a pictorial diagram and a schematic diagram. And everything has begun to thaw. Learn how to test the thermistor to see if it's working. Evaporator Fan Motor. If the temperature control passed the electrical function test but the refrigerator runs continuously, freezing everything in the refrigerator compartment, the problem is a defective temperature sensing bulb on the temperature control. Is your freezer not as cold and your fridge getting warmer? There are several signs that you need to watch out for if you have a bad refrigerator thermostat. The schematic diagram, on the other hand, uses symbols to represent the components. Hunker may earn compensation through affiliate links in this story. Begin by using the pictorial diagram, but learn the meaning of the symbols too because some manufacturers only provide a wiring diagram in schematic format. When it's time, take the temperature for the water and the oil again. You'll need an accurate instant read thermometer, like a kitchen cooking thermometer, to do this. The wheel or knob control is typically situated inside the refrigerator at the back, while the thermostat is within the appliance cabinet behind the control. But if you at least know the thermostat works, then you've crossed one possibility off the list. Does it seem like … By creating an account you agree to the Hunker, Bob Vila: Solved! The temperature-sensing bulb is an integral part of the temperature control switch, so you need to replace the complete control. But how do you know it's the thermostat and not one of the many other potential troublemakers? The safe range for a fridge is 32 to 41 degrees Fahrenheit, according to Mr. Appliance. As you slowly rotate the temperature control knob from its “Off” to its maximum cold position, the meter should display a “0.000” on its display. So how can you test the accuracy of the thermostat? References Education DX: Multimeter: Testing Refrigerator Parts She's in love with experiencing traditional decor around the world, including stays in Thai teak plantations on the Mekong River and cave homes in Turkey. There's a lot going on in a fridge — components aplenty can all affect performance, like the coolant, condenser coils, door seals, the thermostat and even the ambient temperature in … The problem is, the thermostat may display those temperatures, but still be inaccurate. If you have a refrigerator that never cycles on or a refrigerator that runs continuously, freezing everything in the refrigerator and freezer compartments, the chances are good that you have a bad thermostatic temperature control.
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