Thursday, February 7, 2013
Wednesday, January 9, 2013
As an Meridian idaho appliance repair technician, I sometimes have to drive far. In this case, the repair service was in Star. While I prefer to work on Meridian Appliances, sometimes you have to bite the bullet and do what's necessary.
This GE Oven had a bad front-right burner element. It was a triple burner, three individual coils to provide heating. Anyway, a long drive, we got the appliance repaired quickly and another satisfied customer.
Wednesday, December 12, 2012
Saturday, October 20, 2012
Tuesday, October 16, 2012
Monday, April 2, 2012
Engineers had to devise a way to defrost the evaporator coils and still allow cooling in the refrigerator. Most early refrigerator models use a timer, heater, bi-metal combination. I'll talk about each one of these separate:
Heater: On most models, GE, Whirlpool, Kenmore, Maytag, a heater bar is positioned on the bottom of the evaporator. The compressor turns off and AC current flows through the heater to make it glow red hot and to radiate heat. Since heat rises, it radiates upward to melt all the frost off the refrigerator appliance's evaporator coils. Well, this heat can't go on forever otherwise we would cause the refrigerator/freezer to warm. So, enter the appliance's timer mechanism.
Timer: Approximately every 8 hours, the timer will switch off AC Power from the compressor and switch it to the heater. The duration is controlled by the timer, usually 20-30 minutes. When the 20-30 minute defrost has been completed, the timer switches AC Power from the heater, back to the appliance's compressor , evaporator and condenser fan motors.
Bi-Metal: The refrigerator's bimetal acts as a "safety" to guarantee the evaporator does not get too warm. It is usually located at the top of the evaporator. To be plain, it is actually a switch/thermostat wired in series with the defrost heater and it is engineered to open and close at a predetermined temperature. It closes when it is cold and it opens the circuit when it's warm, usually from 35-55 degrees Fahrenheit.
Hope this helps some of your appliance repair questions and you can always visit us for more topics and articles.