AC Problem

29/Jul/2007 /20:42 Filed in: 1967 Cadillac DeVille | Restoration
blowerproblemsmall_powerservoothersideHDR
The blower motor on my 67 wont come one when I switch on any heating or cooling position. It sometimes comes on in the "ICE" position but not always. After lots of searching I found out that the vacuum master switch does not get enough vacuum to be switched on. When I push the backside of it - everything works as it should. Of course that´s no real solution. Looks like my system needs a good overhaul.
Three parts could cause this problem:
  • The dash switch with its rotary valve from where I can hear a slight hissing noise,
  • the power servo on the firewall
  • or the master switch itself - what I doubt.
As I hate when something does not work on my cars I ordered all the parts. I found a good source which sells all these parts rebuilt. Hopefully they will arrive soon as I would like to have this issue resolved before the Cadillac Big Meet. It should not be too much of a hassle to install them when they are here.

blowerproblemsmall_powerservoHDR
the power servo
blowerproblemsmall_masterswitchHDR
the power servo and master switch

1967 Cadillac Air Condition Electrical Diagram
the electrical circuit of the Air Conditioning system of the 1967 Cadillac DeVille in a digram

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