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How your refrigerator works

The refrigerator is a standard item in today's household. Many homes in fact have not only a refrigerator with its built-in freezer compartment but also a separate stand-alone freezer. Some also have smaller refrigerators for the wet bar or out in the motor home. Basic operation, maintenance, troubleshooting, servicing, and repair is the same for all of them

A refrigerator or freezer works on the principle that a gas cools as it expands and gives off heat when it is compressed. A refrigerator or freezer has four basic parts: the compressor, the tubes carrying refrigerant, a fan, and a thermostat. A compressor is used to compress or "squeeze" the refrigerant and usually also to pump it. A length of tubing is connected to the compressor and provides a completely sealed path. The tubes are filled with the refrigerant, which is usually Freon, either type R-12 or type R-22. This tubing is divided into two basic sections: the evaporator and the condenser. The names tell you just what is going on in that section. In the evaporator, the liquid Freon vaporizes into gas. It evaporates. In doing so it becomes cold and is capable of absorbing heat from the inside of the refrigerator. Evaporation occurs because the liquefied Freon flowing into the evaporator is flowing into an area of low pressure. It then passes through the compressor and into the condenser.

The compressor squeezes the vaporized Freon and puts it under high pressure. As the pressure increases, the Freon loses the heat it has picked up in the evaporator side. This is helped along by cooling fins or wires attached to the tubing and often by a fan that blows air across the coils. The increasing pressure and the lowering temperature turns the vapor back into a liquid. It condenses. To further increase this action, a capillary tube is used to connect -or rather to separate - the high pressure condenser from the low pressure evaporator. As the refrigerator shuts off from its cooling cycle, you will hear a soft whooshing sound. This is the rebalancing of pressure between the two components. A thermostat is used to measure the temperature inside the refrigerator and to trigger the compressor and fan. If the temperature inside exceeds the setting, the compressor comes on and the cooling cycle begins all over again.

Caution must be exercised when working with any refrigeration appliance. The Freon inside the tubes is under pressure. It can be dangerous under certain conditions and can turn into a poisonous gas. Many of the problems involved require special equipment and background and are best left to a professional.

Maintenance tips

An uninstalled and unused refrigerator can be one of the most dangerous appliances in the home. If an old refrigerator is not in use, be sure to remove the doors! This is to reduce the possibility of danger to small children. Most recent refrigerator/freezer models have specially designed doors that help to prevent children being accidentally locked inside.

For normal vacation periods of up to four weeks, no special attention need be paid to the modern refrigerator or freezer. Under frost-free automatic operation, they can be left unattended with controls at their normal settings. If you are to be away with the appliance unused for periods of over a month, then remove food, turn all temperature controls off, clean and wipe the interior dry, and leave the doors open in order to prevent odors.

If you are moving a freezer or refrigerator from one location to another, first remove all stored foods and thoroughly clean the appliance. Then remove all shelves, trays, drawers, the evaporator pan, and any other loose parts and pack these separately. Tightly tape any moving parts such as the lever for the automatic ice maker into position. Disconnect the power plug from the wall outlet, and always be sure to handle the appliance with care.

Los Angeles Appliance Repair and Service

http://www.appliancemidwest.com/

http://www.midwestappliances.com/

If you have a problem with your home or business appliance and are located in Los Angeles county, you may need professional appliance repair help. Midwest APPLIANCES are available for all your appliance needs and are open 24 hours, seven days a week. Our dispatchers are also available 24 hours, seven days a week and there is no extra charge for appliance repair on the weekends or evenings.

If you need help anywhere in Los Angeles County, call

310 614-8788

310 600-6007