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How to Test a Refrigerator Relay Switch. The thermostat inside the refrigerator tells the compressor when to turn on and turn off to maintain safe cooling levels. When the temperature inside the refrigerator rises above the current thermostat settings, the thermostat sends an electrical signal to the relay switch to start the compressor.
How to Test a Refrigerator Start Relay Step 1 - Disconnect from the Electrical Source. Step 2 - Find the Start Relay. Locate the start relay. Step 3 - Access the Start Relay. Take off the cover to the box by loosening it with... Step 4 - Test the Relay. Find the "s" and "m" plug-type terminals ...
How to Test a Refrigerator Compressor Relay Step 1. Before working on your refrigerator, always unplug the unit or turn off... Step 2. Locate the compressor. It is usually large and cylindrical,... Step 3. Note that some older refrigerators use a capacitor with their compressors. Step 4. Remove ...
Learn to test the start relay of the compressor: 1. Disconnect the refrigerator As you are going to work in the rear part, for your protection, the appliance should not be energized. This is a safety recommendation which must be followed when you are working with parts or equipment driven by electricity.
How to Test a Refrigerator PTC Relay - Steps Expose the back of the fridge to get access to the motor. Find the fridge compressor and remove the plastic case that houses the starting circuitry. Find the PTC relay. Shake the PTC relay. Inspect the part visually and smell it. Use a multimeter to ...
How To Test Refrigerator Compressor START RELAY / OVERLOAD (Compressor clicking won’t start) The start relay can also cause the fresh food and the freezer sections not to work.
An assortment of thermal fuses A thermal cutoff is an electrical safety device that interrupts electric current when heated to a specific temperature. These devices may be for one-time use or may be reset manually or automatically.
Diagram of a bimetallic strip showing how the difference in thermal expansion in the two metals leads to a much larger sideways displacement of the strip A bimetallic coil from a thermometer reacts to the heat from a lighter, by uncoiling and then coiling back up when the lighter is removed. A bimetallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper, or in some cases steel and brass. The strips are joined together throughout their length by riveting, brazing or welding. The different expansions force the flat strip to bend one way if heated, and in the opposite direction if cooled below its initial temperature. The metal with the higher coefficient of thermal expansion is on the outer side of the curve when the strip is heated and on the inner side when cooled. The sideways displacement of the strip is much larger than the small lengthways expansion in either of the two metals. This effect is used in a range of mechanical and electrical devices. In some applications the bimetal strip is used in the flat form.
Honeywell's iconic "The Round" model T87 thermostat, one of which is in the Smithsonian. Next Generation Lux Products TX9600TS Universal 7-Day Programmable Touch Screen Thermostat. A Honeywell electronic thermostat in a retail store A thermostat is a component which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint. Thermostats are used in any device or system that heats or cools to a setpoint temperature, examples include building heating, central heating, air conditioners, HVAC systems, water heaters, as well as kitchen equipment including ovens and refrigerators and medical and scientific incubators. In scientific literature, these devices are often broadly classified as thermostatically controlled loads (TCLs). Thermostatically controlled loads comprise roughly 50% of the overall electricity demand in the United States. A thermostat operates as a "closed loop" control device, as it seeks to reduce the error between the desired and measured temperatures. Sometimes a thermostat combines both the sensing and control action elements of a controlled system, such as in an automotive thermostat.