AI4Car / How it works

Engine & cooling

Name: AI4Car - OBD2 Scanner
Author: AI4Car

Heat, temperature and the parts that control them.

Weak cabin heat with a warm engine has several possible causes

Airflow controls, coolant circulation, heater-core restriction, and blend doors can create similar complaints.

Some gauges are damped and stay near the middle across a range of actual temperatures.

Some vehicles continue cooling after the engine stops, depending on temperature and control strategy.

The engine did not reach the expected temperature in the expected time. That is a clue to test the cooling system, not a diagnosis by itself.

Before the engine starts, coolant temperature should be plausible for the conditions around the car.