I have a Mazda that has no heat and I have replaced the THERMOSTAT and made sure the HEATER CORE IS NOT BLOCKED. I am now stumped. The car Temperature gauge is looking good (when cold it shows cold) (when normal running it is in the middle) and has never overheated at all.
2003 Mazda Protege DX
2.0 L.
4 Cyl.
2003 Mazda Protege DX
2.0 L.
4 Cyl.