The heater core is a small radiator that uses hot engine coolant to warm the air blowing into your cabin. When it leaks or clogs, you may notice weak heat, fogged-up windows, or a sweet smell inside the car. Replacing the heater core restores reliable, comfortable heat for cold-weather driving.
Find a TechnicianA common cause is a clogged or leaking heater core, which prevents hot coolant from warming the air. Low coolant or a faulty thermostat can also be to blame, so a proper inspection is the best first step.
It can cause coolant loss and engine overheating, and the fumes inside the cabin are unpleasant to breathe. It's best to have it repaired promptly to avoid bigger problems.
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