Question about 1991 Mazda 323
Check the contacts with the screen, as these often corrode.Also that the earth contact is good. Carefully wiggle them off, apply a thin coat of vaseline, and push them on again.
Also check the main fuse is ok. The other causes to check are that there is power to the switch, that the heater relay is working, and that power is getting through to the heater.
Posted on Jan 08, 2009
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Posted on Jan 02, 2017
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