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Glossary of Appliance Terms
The 'V' page

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Valve coil – the electromagnetic coil of wire used in appliance water fill valves, drain valves, gas control vales, and others. Commonly operate on AC.

Vent hood – 1) the opening in the outside house wall through which a dryer vents. Designed to keep  weather and 'critters' out, these are equipped with either a flapper or louvers that are opened by the dryer's outlet air pressure, 2) also 'range hood': the large 'funnel' installed over a stove to catch and divert cooking heat and vapors outside the house. Usually fan-forced, some 'recycle' air through a filter and back into the house, but it's best to exhaust these to the outside air through a hole cut in the wall.

Voltage doubler – The circuit in a microwave oven's high voltage section that effectively doubles the voltage output of the HV transformer.

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