You select heat but the vents blow cold. The fan works, but no warmth is being added — typically a coolant flow or blend-door issue.
Find a ProviderEither hot coolant isn't reaching the heater core (low coolant, clog, thermostat) or the blend door isn't directing air through it.
Yes — low coolant is one of the most common and easiest-to-check causes of cold heater air.
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