Heat and air wont turn on only displays dashes - - where temp is to be adjusted
SOURCE: 1999 cadillac deville air wont work
There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.
The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.
SOURCE: water leak inside on passenger side from under the
Your heater core is leaking, and when it does, it drains into the foot well passenger side. Best case would be a hose that is leaking, worst case is the core itself. Replacing the core is a big job.
SOURCE: 1999 cadillac deville 4.6 heater blowing cold
Besure that you have enough coolant. Your engine has head bolt issues and this allows compression gases into the sooling system, and this pushes coolant out and the heater goes cold before the engine everheats.... VERY expensive to fix correctly. There is a test to determine if exhaust gases are in the cooling system...
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