Car Heater Not Working
The heater blows cold or barely-warm air and the cabin won't warm up. Usually a coolant, heater-core, or blend-door problem rather than the AC side.
Find a TechnicianCommon causes
- Low coolant level
- Clogged or leaking heater core
- Stuck thermostat keeping the engine cool
- Failed blend-door actuator
- Air pocket in the cooling system
Frequently asked questions
Why is there no heat even though the engine is warm?
Heat comes from hot coolant flowing through the heater core; if it's clogged, low on coolant, or the blend door is stuck, warm air never reaches you.
Is driving with no heat a problem?
It's safe but uncomfortable, and a stuck thermostat or low coolant can also affect engine temperature, so it's worth checking.
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