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How do I replace a Temperature Control Thermostat in a Top-Mount Refrigerator?

In the machine compartment next to the compressor, the drain tube is used to transfer the water from the evaporator to the drain pan, where it can evaporate. If the drain tube is damaged, the water won't drain from the tray and will overflow into the freezer or refrigerator compartment. If the drain tube is damaged you should replace it.

The bi-metal thermostat-trips, also known as the refrigerator defrost sensor, are used to detect when the temperature of the evaporator is getting hot enough to cause overheating. The power was cut off when the sensor tripped. frost builds up on the evaporator fins of the refrigerator and freezer if the defrost sensor trips. To check the sensor for continuity, you can use the volt-ohm meter. If the sensor doesn't show continuity at 0 degrees F, replace it.

The cold control thermostat is located in the control housing and is also called the temperature control thermostat. The temperature inside the refrigerator cabinet can be detected by the thermostat's sensor tube. The temperature control thermostat can be used to control the temperature inside the cabinet by turning on and shutting off the compressor based on the temperature in the sensor tube. If the temperature control thermostat fails to sense temperature or if it doesn't cycle the compressor, it's time to replace it.

The fan is on the assembly. The air is moved through the cabinet for cooling. If the fan is malfunctioning, replace it.

The frost from the evaporator is melted by the refrigerator automatic defrost system. The compressor stops, the heating element turns on, and the frost starts to melt. There is a drain pan next to the compressor in the machine compartment where the condensate flows through a drain tube. The water left the drain pan before the next thaw. Diagnostic and repair the problem if the defrost process fails.

The intervals between automatic defrost cycles in the refrigerator is controlled by the defrost timer. The control components in the device are moved by the motor of the defrost timer. When the control contacts in the defrost timer advance into the defrost cycle, the compressor stops and the defrost heater turns on for a period of time to melt frost off of the evaporator fins. This encourages more efficient exchange of heat. When the period of defrost ends, the defrost timer contacts switch back to allow normal cooling in the fridge.

There are ice makers and/or water dispensers in many refrigerators. A water leak can be caused by the broken water line in the refrigerator. Water lines inside the refrigerator are being replaced.

When the door is shut, the gasket on the fridge or freezer door prevents air from entering or escaping the cabinet. When the door is closed, a damaged gasket lets warm, moist air into the fridge. The door seal should be replaced if it's damaged.

Follow these steps to fix your issue:

  1. Remove creases in the new door gasket.

    If you want to smooth out the folds in the door gasket, soak it in warm water and dry it with a towel. Carefully warm it with a hair dryer or heat gun. It's important to not melt the gasket. The door gasket expands when heating it. If the gasket seems too big for the door after heating, it's a good idea to cool it.

  2. Remove the refrigerator door gasket.

    Shut off the circuit breaker for the fridge or turn it off. The gasket needs to be pulled out of the track. It's easiest to start at one of the corners. To start the removal process, you need to tug the gasket firmly. Pull the gasket out from the side of the door if you have a hard time starting at a corner. You should be able to pull the gasket out easily once the removal process starts.

  3. Clean the track in the refrigerator door.

    If there are spills around the track, wipe them off with a wet cloth. The track needs to be cleaned to make sure the gasket fits in the track and seals the door correctly.

  4. Install the new gasket.

    Start at the top of the door and work the gasket into the track. You can go down both sides of the door. Check for loose spots and adjust the gasket for a proper fit. To help the new gasket seal properly, spread a thin coat of petroleum jelly along the seal surface of the door gasket. If you want to check the fit, close the door. There should be no gaps between the cabinet and door. It's a good idea to smooth out any gaps. The door gasket should be pushed further into the track to eliminate gaps.

  5. Disconnect electrical power.

    Shut off the circuit breaker on the refrigerator. Highly perishable food should be moved to a cooler. Most frozen and refrigerated foods won't be affected by the lack of power for 30 minutes.

  6. Remove the control knob.

    To remove the control knob from the temperature control thermostat, remove it from the front of the thermostat.

  7. Detach the control housing.

    The control housing is on the top of the refrigerator compartment. After you remove the last screw, support the control housing. wires prevent you from lowering the control housing further.

  8. Release the temperature control thermostat.

    The brackets that hold the thermostat and tube should be loosened. The thermostat and tube should be removed from the control housing. If you want to use the new temperature control thermostat, you have to remove the insulation sleeve that covers the tube.

  9. Disconnect the wires.

    (not-been-paraphrased) Take a digital picture of the wires or tag them with numbered pieces of masking tape so you know how to reconnect them.  Remove the wires and pull the temperature control thermostat out of the refrigerator. Set it aside for disposal.

  1. Connect the wires to the new thermostat.

    Take the temperature control thermostat out of its package and fix the sensor tube. Transfer the old tube to the new one on the thermostat if you covered it with an insulation sleeve. You can use the digital image as a guide to connect the wires. Failure to connect the wires can damage the refrigerator component. A service technician can help you connect the wires.

  2. Insert the new temperature control thermostat into the bracket.

    Put the thermostat and tube in the control housing and push them into the brackets. The control housing should hold the new temperature control thermostat in the same way it held the old one.

  3. Attach the control housing.

    Make sure the wires are positioned correctly so the control housing doesn't pinch them by pushing it into position. Attach the mounting screws with a firm twist and tighten them until they stop turning.

  4. Reinstall the control knob.

    Push the control knob onto the stem completely when you position it on the front.

  5. Restore electrical power.

    You can restore power by plugging in the refrigerator or the house circuit breaker.

Time required: 15 minutes.

You would need the following tools: screwdriver, work gloves.

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