Heater Core & Control - Body, Electrical & Interior Symptoms
Common symptoms and diagnostic guides.
Heat feels soft even on high
Weak heat even on high fan setting usually means insufficient hot coolant or airflow issues in the heating system, often due to thermostat, heater core or control valve problems.
Heat barely feels powerful
If your car's heat barely feels powerful, it may be due to low coolant, a stuck thermostat, or a clogged heater core. Discover how to diagnose and fix these common HVAC issues.