How do you repair the heater on Mazda mx-3?

To repair the heater on a Mazda MX-3, start by checking the coolant level and ensuring there are no leaks in the cooling system. Inspect the heater core for blockages or damage, and flush it if necessary. Check the operation of the thermostat and the heater control valve, replacing any faulty components. Finally, verify that the blower motor is functioning properly to ensure warm air is circulated effectively.