Your Mazda 626's heater is controlled by an electrical switch that is mounted behind the heater panel. With excessive use, the contacts of the switch can wear down over time. If the switch goes bad, it can prevent you from being able to turn on the heater in your Mazda. Purchase a replacement heater switch at any auto parts store. It will take you approximately 45 minutes to change the switch.
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Things you need
- Socket set
Open the hood of your 626, slip the socket wrench over the negative battery cable screw and loosen it. Once it is loose, remove the cable.
Pull off the heater control knob by hand. Use a pair of pliers to remove the knob if it does not come off easily by hand.
Pry off the heater trim panel on your Mazda 626 with your screwdriver.
Remove the two mounting screws that hold the heater assembly in place, using a screwdriver. Set the screws aside and pull the assembly forward to expose the switch on the rear.
Unplug the plastic wiring plug from the back of the switch by pulling it out by hand. Detach the screws that hold the heater switch assembly in place and remove the old switch. Position the new switch and secure it with the two assembly screws.
Attach the wiring plug into the back of your Mazda's new switch.
Slide the heater assembly back into your dash and replace the two mounting screws. Reposition the trim panel by hand. Reconnect the negative battery cable.
Turn your ignition on and test the new switch to make sure it engages.
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