Glossary “hot wire” Definition:
1). Wire that carries current from the ungrounded terminal of the battery to an electric load. 2). To bypass the ignition switch to start the vehicle.

Glossary “hot wire sensor” Definition:
Electrical device inside the mass-airflow meter that measures air flow and density.

Glossary “hot working” Definition:
The mechanical working of metal at a temperature above it recrystallization point and high enough to prevent strain hardening.

Glossary “hot soak” Definition:
1). Condition that may occur when an engine is stopped for a period of time after a hot hard run, causing the gasoline to evaporate out of the carburetor. 2). A period of time where localized combustion heat dissapates through the engine. 3). Allowing a vehicle to sit at a high temperature until all internal and external components stabilize. 4). Federal test procedure for new vehicle certification of overall emission output. This test is normally done in a sealed chamber and all emissions coming from the vehicle are measured. These include exhaust, evaporative. tires, paint, and interior component emissions, in other words, all emissions given off from a vehicle.

Glossary “hot spot” Definition:
1). A localized area where excessive heat can build up, such as around a spark plug, that could cause preignition. 2). An area on an vehicle’s body where corrosion is most likely to occur.

Glossary “hot tank” Definition:
A large vat containing a hot, caustic chemical solution that is used to clean the engine block and parts.

Glossary “hot tank gloves” Definition:
Long -sleeved, thick rubber gloves for use in the hot tank.

Glossary “hot weather solvent” Definition:
A reducer or thinner. It is designed to slow solvent evaporation to prevent problems during periods of hot weather.

Glossary “hot idle compensator” Definition:
Temperature-sensitive carburetor valve that opens when the inlet air temperature exceeds a certain level to allow additional air to enter the intake manifold, preventing an overly rich air/fuel ratio.

Glossary “hot patch” Definition:
Patch applied to a tube or tire with use of heat to vulcanize it onto the damaged surface.

Glossary “hot rolled steel (HRS)” Definition:
Steel that is formed while hot.

Glossary “hot gas defrosting” Definition:
The use of high-pressure gas in the evaporator to remove frost.

Glossary “hot air plastic welding” Definition:
Uses a tool with an electric heating element to produce hot air which blows through a nozzle and onto the plastic material.

Glossary “hot drawn” Definition:
Process of forming metal by heating it and pulling it through rollers or dies.

Glossary “hot gas” Definition:
Condition of refrigerant as it leaves the compressor until it gives up its heat and condenses.

Glossary “hot gas bypass line” Definition:
The line that connects the hot-gas bypass valve outlet to the evaporator outlet.

Glossary “hot gas bypass valve” Definition:
Device used to meter hot gas back to the evaporator, through the bypass line, to prevent condensate from freezing on the core.