how do you fix a heater in a mazada 929 1992?

Answer 1

That's a pretty vauge question.
So here's a pretty vauge answer.

Replace the fuse.
Replace the heater core.
Replcae the blower motor.
Replace the hoses.
Replace temperature controler.
Replace the switch.
Replace the coolant.

Answer 2

if you don;t know, then I would someone else to do it....Na just kidding have a good day... when you buy the new one there will be directions... PS you can by pass the heater core to the engine it will get you through the winter..