Climate control blows hot, cold

Dear Doctor: I have a 2000 Cadillac Eldorado with dual-zone climate control. When I turn on the a/c the front outlets on one side blow hot while the other side blows cold. The same thing happens when I turn on the heat. Any suggestions? Ron

Dear Ron: The most common fault on this car is a faulty blend door actuator motor. You can check the fault codes with a good scan tool and it will lead you right to the source of the problem.

Dear Doctor: I own a 1998 Ford Expedition 5.4L V-8. There is a problem with blowing a fuse when I push the overdrive button while driving. If I push the button while in park the fuse does not blow. The mechanic said there is a short in the steering column. What do you think? Chris

Dear Chris: I would disconnect the overdrive connection at the transmission and road-test the truck to verify the problem. There could be a short in either the steering column or the overdrive circuit in the transmission. You will need to look at the wiring diagram and follow the wires.

Junior Damato is an ASE-certified Master Technician.

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