Mechanics

HEATER

1994 Cadillac Fleetwood

Air Conditioning problem
1994 Cadillac Fleetwood V8 Two Wheel Drive Automatic 64000 miles

heater dose not work? AIR WORKS.
fan work on top with air, dose not with heat?
but fan is runing
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Bobhoover
November 22, 2008.



Check the vacuum source connection. It will a small plastic tube connected to either to the intake manifold or to a junction on the firewall. The tube is usually black or red. I vacuum source is good, check under the dash to see if the vacuum dampers are moving as you turn the selector switch from floor heat to AC, and from floor heat to defrost. If nothing moves, check for vacuum at the selector switch. If yes, change the switch.

Tiny
James W.
Nov 22, 2008.