DEFINITION
It controls the amount of coolant flowing through the heating core. Most modern systems first cool and dehumidify the air and then reheat it to the desired temperature. These valves can be either vacuum-controlled or electronic controlled.
LOCATION
The exact location of the heating solenoid valve may vary depending on the vehicle’s model and brand. Typically, it can be found within the coolant circuit and close to the manifold.
COMMON FAULT SYMPTOMS
- Obstruction or blockage
- Faulty opening or closing
- Electrical failure
- Mechanical blockage
FAULT EFFECTS
- Lack of heating
- Insufficient or irregular heat
- Unusual noises
- Windshield fogging issues
- Engine overheating
- Inefficient fuel consumption
- Unusual noises
- Coolant leaks
