Keep refrigerator frost free
Like an air conditioner, refrigerators operate on a standard cycle. A compressor pushes refrigerant through two connected sets of coils. In the low pressure area of the evaporator coils inside the unit, the refrigerant becomes a gas and absorbs heat. The high pressure condenser coils on the outside while the gas becomes liquid and loses heat to the room air.
Frost buildup is a large obstacle to efficient refrigerator operation. Most systems use either an automatic frost free or a semiautomatic cycle defrosts method to melt the frost. On frost free modules, a timer turns on a defrost heater about two times a day to warm up the evaporator coils. The evaporator coils are encased in the back or floor of the freezer. A fan is also encased that helps circulate air over the coils and into the food compartment. A cycle defrost system keeps only the refrigerator frost free; keeping the freezer defrosted is a manually process. On both types of defrost systems, the melted frost drains down into a pan that sits under the unit and evaporates.
Repairs to the sealed refrigeration system, the compressor, condenser coils and evaporator coils are best left to professionals. Repairs to most other parts on the refrigerator are relatively easy. One common problem is lint build up and dust clogged condenser coils. When airflow across the coils are blocked the unit may stop running or run continuously. Cleaning the coils with a vacuum will extend the refrigerator's life and reduce running costs.
Other common causes to frost build up.
· Condenser fan - Poor cooling, a clacking noise or short cycling may indicate a condenser fan problem.
· Control Panel - The control panel houses the thermostat. It's sensing tube and the dial controls a baffle that lets cold freezer air into the refrigerator.
· Defrost Timer - This timer activates the heater that melts frost in the evaporator.
