REPAIRING THE AIRCONDITION OF THE 1966 COUPE DEVILLE
28 | 08 | 14 | 11:01 | Filed in: Restoration | 1966 Cadillac Coupe deVille
When the 1966 Coupe deVille arrived at my garage the AC was completely inoperable. Nothing worked - the blower would not come on at all.
So I started to search for the cause of the problem.
Everything seemed to be fine on the vacuum side. When the lever on the control panel was moved all the vacuum actuated doors operated and the master vacuum switch also seemed to work.
After some searching I found out that no current was flowing through the master vacuum switch on the firewall.
So the switch was taken apart.
If you do this you have to be very careful not to damage the membrane.
The contacts inside the switch were oxidized and so no more current could flow through.
The contacts were also adjusted so that the switch could engage properly when vacuum was applied.
When everything was put back together the whole system once again worked as it should.
It works absolutely perfect now.
Unfortunately I forgot to take pictures of the switch rebuild but here is a video on youtube where a gentleman explains how this switch works…
So I started to search for the cause of the problem.
Everything seemed to be fine on the vacuum side. When the lever on the control panel was moved all the vacuum actuated doors operated and the master vacuum switch also seemed to work.
After some searching I found out that no current was flowing through the master vacuum switch on the firewall.
So the switch was taken apart.
If you do this you have to be very careful not to damage the membrane.
The contacts inside the switch were oxidized and so no more current could flow through.
The contacts were also adjusted so that the switch could engage properly when vacuum was applied.
When everything was put back together the whole system once again worked as it should.
It works absolutely perfect now.
Unfortunately I forgot to take pictures of the switch rebuild but here is a video on youtube where a gentleman explains how this switch works…
A video that explains how this switch works
The original AC system of the 1966 Coupe deVille is now working perfectly again.
Thats the master vacuum switch which was defective.
The rebuilt master vacuum switch.
blog comments powered by Disqus
1958 Cadillac (53)
1966 Cadillac Coupe deVille (8)
1967 Cadillac DeVille (52)
1967 Cadillac Eldorado (65)
1971 Lincoln Continental Mark III (20)
1974 Cadillac Coupe deVille (39)
1978 Cadillac Eldorado Biarritz (16)
1996 Buick Roadmaster (18)
Car Shows (41)
Cruising (3)
For Sale (3)
Garage Stuff (31)
Pacer (1)
Restoration (121)
Various (50)
Video (6)
Website News (30)
1966 Cadillac Coupe deVille (8)
1967 Cadillac DeVille (52)
1967 Cadillac Eldorado (65)
1971 Lincoln Continental Mark III (20)
1974 Cadillac Coupe deVille (39)
1978 Cadillac Eldorado Biarritz (16)
1996 Buick Roadmaster (18)
Car Shows (41)
Cruising (3)
For Sale (3)
Garage Stuff (31)
Pacer (1)
Restoration (121)
Various (50)
Video (6)
Website News (30)
- 6 way power seat
- 8-track
- 10 Ohm
- 429
- 1932
- 1957
- 1958
- 1958 Cadillac Eldorado Seville
- 1958 Cadillac Repair Tip
- 1959 Cadillac Eldorado Seville
- 1964
- 1965
- 1966
- 1966 Cadillac Coupe deVille
- 1966 Cadillac Repair Tips
- 1967
- 1967 Cadillac DeVille
- 1967 Cadillac Eldorado Repair Tip
- 1967 Cadillac Repair Tip
- 1967 Eldorado
- 1968
- 1970 Cadillac Eldorado
- 1971
- 1974
- 1974 Cadillac Coupe DeVille
- 1974 Cadillac Repair Tip
- 1977
- 1978
- 1978 Cadillac Eldorado Biarritz
- 1978 Cadillac Repair Tip
- 1980 Cadillac Eldorado Biarritz
- 1996
- 2012
- 2014
- 2017
- 2018
- 3063206
- 7800483
- 7805675
- 7805676
- 12355706
- 17058531
- 17059968
- 17059969
- 22010515
- 22010661
- A.I.R
- A6
- AC
- AC Compressor
- AC Electrical Diagram
- ACC
- Actuators
- Adriatic Blue Metallic
- Ads
- Air Pump
- Aircondition
- AIRPUMP
- ALC
- Alternator
- AM
- AM-Transmitter
- Antenna
- Antique Gold
- Arizona Vintage Parts
- Arrival
- Article
- ASC
- Ash Tray removal
- ATC
- Atlantis Blue Firemist
- Austria
- Automatic Seat Back Release
- Banner
- Barn Find
- Battery
- Battery Tray
- Bearing
- Bendix
- Biarritz
- Bigfoot
- Bill Hirsch Engine Enamel
- Bleeder Screws
- Blower
- Bolts
- Borg
- Brake Booster
- Brake Fluid
- Brake Gray
- Brakes
- Broken Bolt
- Brougham
- Bucket seats
- Buick
- Bumper End
- Cadillac
- Cadillac BIG Meet
- Cadillac BIG Meet
- Cadillac birthday cake
- Cadillac Blue
- Cadillac Color Selections Dealer Book
- Cadillac Coupe deVille
- Cadillac Dealer
- Cadillac Meeting
- Camaro RS
- Car Show
- Carburetor
- Card
- Carpet
- Cavalry Twill Vinyl
- CB
- CCCD
- Choke
- Christmas
- Citizens Band
- Clay Towel
- Cleaning
- Clock
- Clockwork
- Clutch
- Clutch Coil
- Colonial Yellow
- Commercial
- Compound
- Compressor
- Condenser
- Continental Mark III
- Control Head
- Conversion
- Convertible top
- Coolant
- Cowl
- Cruise Control
- Cruising
- CV Boots
- D6230
- Dash Trim
- Decal Removal
- Decals
- Decoration
- Dehumidifier
- Delco Moraine
- Der Standard
- detailing
- Deville
- Diagnosis Chart
- Diagram
- Dial
- Digital Rotary Drum Clock
- Diner
- Distributor
- Diverter Valve
- Door Jamb Switch
- Dornbirn
- Dot3
- Drive Shaft
- Driving tour
- Dry Ice Blasting
- Dry Ice Cleaning
- DVD
- Eastwood
- Eldorado
- Electric Choke Thermostat
- Electrical schematic
- Elvis
- Engine Bay
- Ep
- Epoxy floor
- Europe
- Evaporator
- Exide
- Factory Markings
- Fender Skirt
- Floor
- Flushing
- Foam
- For Sale
- Front bumper filler
- Front Floor
- Front wheel bearing
- Fuel Filter
- Fuel Pump
- Fuel Sending Unit
- Fusible Link
- Garage
- Gasket
- Gear indicator
- General Time
- Glove box light
- H4
- Haus of Hot Rod
- Headlight Actuator
- Headlight doors
- Headlights
- Heater Core
- Heater Hose
- Heater Valve
- High Idle
- Hood
- Hood Emblem
- Hood Ornament
- Hose Clamp
- Hot Water Valve
- HotRod
- How to
- Hödlmayr
- Ignition Diagram
- Illuminated Entry
- John D‘Agostino
- Klassikwelt Bodensee
- Kremsmünster
- LaSalle
- Leather seats
- Light Switch
- Limited
- Lincoln
- Lincoln Mark III Repair Tip
- Low Mileage
- Magazine
- Marilyn Monroe
- Mark III
- Master Cylinder
- Master Switch
- Media Blasting
- Meguiras
- MK II
- Mobile
- Moldings
- Mom
- Mopar Nationals
- Mostkost Kustom
- Neon
- NOS
- Oberösterreicher des Tages
- oilchange
- ORF
- Overspray
- Pacer
- Paint
- Paint correction
- Paintjob
- Part Number
- Parts
- Patch Panel
- Perfect Circle
- Persian Lime
- Photo shooting
- Photoshooting
- Pictures
- PinUp
- POA Valve
- Power Antenna
- Power Servo
- Power Vent Windows
- Printed Circuit Board
- Programmer
- Pulley
- Quadrajet
- Quarter Panel
- Quartz Conversion
- R134
- Radiator
- Radio
- Rebuild
- Recalibrate
- RediRad
- Reed Switch
- Relais
- Relaunch
- Removing Overspray
- Repaint
- Repair
- Restoration
- RIP
- Roadhouse
- Roadmaster
- Rochester
- Rocker Arm Cover
- Rocker Panel Extension Clips
- Rostio
- Rotary Valve
- Rotterdam
- Rupes
- Rust removal
- Rust removal gel
- Sabre Wheels
- Sand Blasting
- Sandblasting
- Screed
- Season Greetings
- Seat Back Locks
- Seat Padding
- Seat Transmission
- See through ornament
- Sepp's Garage
- Seville
- Sheetmetal
- Shocks
- shop manual
- short
- Sign
- Solenoid
- Spark Plug Wire Routing
- Speakers
- Speed Bleeder Screws
- Splash Guard
- Starter Diagram
- Starter Motor
- Steering Column
- Storage
- suction throttling valve
- sunroof
- suspension
- Swirl Mark removal
- T3
- Taillight Cover
- Thermostat
- Tilt and Telescope
- Time capsule
- Tomsclub
- Torque Specifications
- Tower Hose Clamp
- Towtruck
- Transducer
- Transmission
- transmission control selector
- transmission control selector indicator light
- transmission shift indicator
- Treadle Vac
- Tri-Band
- Troubleshooting
- Trunk Cardboard Kit
- Trunk lining
- Trunk to bumper cover
- Turn Signal Switch
- TV
- Typisierung
- Ultimate Garage
- Underbody
- Undercarriage
- Undercoating
- Undercoating Removal
- Vacuum Booster
- Vacuum diagram
- Vacuum hoses
- Vacuum Schematic
- Vacuum Valve
- Valve Cover
- Various
- Vent Window Switch
- Vibration
- Vibrator
- Vicodec roof
- Video
- Vinegar
- Vinyl Roof
- Washer Fluid Float
- Washer Fluid Low Level Indicator
- Water Pump
- Wax
- Weatherstripping
- Website News
- Westclox
- Wheel Bearings
- Wheel Housing
- Windlace
- Winter
- Wiring
- Wiring Diagram
- Wonderbar