Glossary

Home | Glossary

Control Switches

FILL VALVE

An electro-mechanical device that opens/closes a valve to control the flow of water. The electric current causes a magnetic field to develop in the solenoid coil which in turn then moves a metallic plunger. The plunger is attached to a diaphragm which opens the valve. May also be called a WATER VALVE or WATER FILL VALVE.

Control Switches

Control Switches COLD CONTROL SWITCH

A switch that controls an electric current in response to changing temperature. It allows the appliance to maintain a proper temperature for the device at all times. More properly called a THERMOSTAT.

RHEOSTAT

An electrical switch that controls the voltage drop across a circuit. It is used to control heat generated by the appliance.

INFINITE HEAT SWITCH

A switch that controls the amount of heat generated by an electric range surface burner. It accomplishes this by quickly cycling the voltage ON and OFF to achieve an intermediate range (e.g. at medium it may supply 100% voltage for only 50% of the time it is switched ON). It does not act like a rheostat and reduces the voltage, to lessen the heat generated, as sometime mistakenly thought.

PRESSURE SWITCH

An electric switch activated by air pressure. This device detects air pressure exerted on it through a flexible tube connecting it to part of a water tub. When activated, this switch then opens an electrical circuit stopping further filling of the machine.

THERMOSTAT

A switch that controls an electric current or the flow of a liquid or gas in response to changing temperature.

DEFROST TERMINATION THERMOSTAT

A bimetal switch used to open the electric circuit to the defrost heater once a set temperature is reached. The defrost cycle will continue until the timer advances into the cooling cycle; however, the heater will no longer be energized. This thermostat will reset to a closed position once a set colder temperature is again reached. May also be called a DEFROST LIMIT SWITCH.

WATER LEVEL CONTROL

An electric switch activated by air pressure. This device detects air pressure exerted on it through a flexible tube connecting it to part of a water tub. When activated, this switch then opens an electrical circuit stopping further filling of the machine. May also be called a PRESSURE SWITCH.

Electrical/Electronic Components

AGITATOR

A device that is used to stir or shake up a mixture. It is typically used to move clothing through water containing detergent. Sometimes called a GYRATOR.

FUSE

A safety device that protects an electric circuit from excessive current. It consists of or contains a metal filament that melts when current exceeds a specific amperage, thereby opening the circuit.

IGNITOR

A solid state semiconductor, usually made of Carbo-rundum that produces heat when a current passes through it. It is typically used to ignite natural gas or propane in heating appliances such as ranges, dryers, and water heaters.

RELAY

An electro-mechanical switch that diverts the current when the flow is changed or when an external current is applied.

SOLENOID

An electro-mechanical device that produces a magnetic field, to move an internal metallic plunger, when power is supplied. When power to the electromagnet is discontinued, the plunger is free again to move by other forces. This plunger can be attached to other devices (levers, seals, etc.) to do mechanical work.

Filters and Collectors

DRAIN PAN

A pan-shaped panel used to collect condensate from the evaporator during a defrost cycle. It is usually located above a condenser coil or atop the compressor. May also be called CONDENSATE PAN.

DRIP PAN/TRAY

A pan-shaped panel used to collect drips, spillage, or condensate.

FILTER DRYER

A device containing screens and absorbent material through which refrigerant gas is passed in order to remove moisture that would be detrimental to other components and the functioning of a refrigeration system.

FILTER

A device containing a porous material or a material itself, through which a liquid or gas is passed in order to separate suspended particulate matter. Common filter materials are activated – charcoal, polypropylene and HEPA (high efficiency particulate air [filter]).

Seals and Padding

DOOR SEAL

A resilient or flexible material used between mating surfaces to provide a leak-proof seal. May also be called a DOOR GASKET.

GASKET

A resilient or flexible material used between mating surfaces to provide a leak-proof seal. May also be called a SEAL

MOULDING

A piece of plastic used to cover the joint between the inner and outer cabinet of a refrigerator or freezer. May also be called a BREAKER STRIP.

Heat Transfer

FREON

Trade name for a family of synthetic chemical refrigerants manufactured by DuPont. Sometime mistakenly called FreeZone.

PUMP

A machine or device for moving or compressing fluids or gases.

COMPRESSOR

An electro-mechanical device used to circulate refrigerant through a refrigeration system for the purpose of transferring heat.

EVAPORATOR

That part of the refrigeration system in which the refrigerant evaporates, absorbing heat from the surrounding area. Sometime mistakenly thought to be that point where the drain pan evaporates the condensate water.

Timers

TIMER

A mechanism used to control the on and off times of an electric circuit. Also, see DEFROST TIMER.

DEFROST TIMER

An electro-mechanical clock device that periodically switches from “cooling” to “defrost” to remove the buildup of frost from the evaporator. A possible compressor run time of 6 – 12 hrs. A defrost duration time of 20 – 30 minutes is common.

Call Us for an Estimate

  • San Francisco 415-585-5900
  • Marin 415-816-1014
  • Peninsula 650-755-8314

Or

Schedule an
ONLINE APPOINTMENT today!

  • Same-Day Appliance Repair Service
  • No Extra Charges For Weekends and Holidays

Get in Touch

Schedule a Service Call

Fields marked with a * are required.

Cities We Service

  • Alameda
  • Albany
  • Atherton
  • Bayview Hunters Point
  • Belmont
  • Belvedere Tiburon
  • Berkeley
  • Brisbane
  • Broadmoor
  • Burlingame
  • Castro Valley
  • Chinatown
  • Concord
  • Contra Costa County
  • Corte Madera
  • Daly City
  • Danville
  • Diamond Heights
  • Dublin
  • El Cerrito
  • El Sobrante
  • Emeryville
  • Excelsior
  • Fairfax
  • Financial
  • District
  • Foster City
  • Fremont
  • Haight-ashbury
  • Half Moon Bay
  • Hayward
  • Hercules
  • Hillsborough
  • Kensington
  • Kentfield
  • Lafayette
  • Larkspur
  • Livermore
  • Marin County
  • Marina
  • Menlo Park
  • Mill Valley
  • Millbrae
  • Mission District
  • Moraga
  • Newark
  • Nob Hill
  • Noe Valley
  • North Beach
  • Novato
  • Oakland
  • Orinda
  • Pacific Heights
  • Pacifica
  • Parkside
  • Piedmont
  • Pleasant Hill
  • Pleasanton
  • Portola Valley
  • Potrero District
  • Presidio
  • Redwood City
  • Richmond
  • Richmond District
  • San Anselmo
  • San Bruno
  • San Carlos
  • San Francisco
  • San Leandro
  • San Lorenzo
  • San Mateo
  • San Mateo County
  • San Pablo
  • San Quentin
  • San Rafael
  • San Ramon
  • Sausalito
  • South Of
  • Market
  • South San Francisco
  • Stonestown
  • Sunset
  • Tenderloin Union City
  • Visitacion Valley Walnut Creek
  • West Portal
  • Woodside