Technician A says a thermostat which opens too soon can cause poor heater operation. Technician B says low coolant level can cause poor heater operation. Which technician is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. A thermostat that opens too soon can prevent the engine from reaching its proper operating temperature, leading to poor heater performance. Similarly, a low coolant level can also result in inadequate heater operation because there isn't enough hot coolant circulating through the heater core to produce the needed warmth.

Technician a Says a Thermostat Which Opens Too Soon Can