I have an 07 Mazda 6 / 4 cyl, heat is not working, blows cold air. Other than a stuck-open thermostat, what could this be ?


Asked by Jan 23, 2011 at 10:24 AM about the 2007 Mazda MAZDA6

Question type: Maintenance & Repair

3 Answers


its very possible for your car to just be low on coolant/antifreeze. check that. if not maybe that thermostat.

2 of 2 people found this helpful.

my 6 has no heat either. coolant is full and just changed the thermostat AND flushed the lines with water. nothing.

2 of 2 people found this helpful.

I just purchased a used 2006 Mazda 6 that was pulling codes for thermostat problems and not blowing hot air inside the cab. I replaced thermostat and it was still blowing cold air. Checked the in cabin air filter (super easy to change) and it was filthy. Changed it out and now I get warm air, but it's not hot. I can't get my dash switch to change to recirculation mode. Wondering if I have some sort of blocked or faulty heater core.

1 of 1 people found this helpful.

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