Anyone ever have problems with their heaters not working fully in Mazda 1993 929? I can run my 929 all day and unless it's warm outside, the heater air never really gets going. Only warms slightly, at best. Suggestions? Thanks!

 

There is the biggest possibility of a thermostst problem. Does the engine temp run about half way up the gauge when hot? If not, then a thermostat is in order. Another thing to check on, but less likely is a partially clogged heater core. If the engine temp is good, feel the heater hoses to see if they are hot. If so, then you would have a problem with the air mix doors under the dash in the airbox.