Environmental controls
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Environmental controls
The other night the function **** for the heater/cooler stopped working, air only comes out of the defrost vents ('99 Mazda B2500), the **** still turns. I took out the center panel and looked behind it. It's all electronic, so I first looked for a fuse that might have blown, but I didn't find a fuse for that specific ****. I then searched the wires to see if one had a short, but I can only inspect what is not difficult to reach. Any advice? I am hoping that I don't have to take in to the rude and over-charging chuckleheads at the dealership.
Haynes manual didn't have any advice to offer.
Haynes manual didn't have any advice to offer.
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I'm thinking vacuum leak here. As I recall, the HVAC system "defaults" to the defroster vents when there is a vacuum leak. Other possiblilty is the notorious blend door problem. Hang on, I'm sure that other people will jump in to help.
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The Haynes manual mentions draining the cooling sysyem when removing the heater core. Could a leak in the cooling system cause the HVAC system to default?
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