Help- Selector switch AC/heater 1969 Riviera GS

[kreed]

Was told yesterday that my AC compressor on my 1969 Riviera is not kicking on because of a bad selector switch . I have tracked down a replacement NOS switch but my question is how big of a job is it to get to that switch? I assume that the dash pad and instrument panel have to be removed to get at it. Looking at my chassis service manual , it appears this is a rather daunting task for the novice . Any secrets or advice from the experts on how to approach this ?? I am willing to tackle it but don't want to do anything that is not necessary. Thanks Ken Reed ROA 14548

[68RIVGS]

It has been a while since I removed my instrument cluster, along with the AC/Heater control unit Ken.

The '68-'69 models are similar. While it is not exactly a simple job, it can be accomplished. Being a part time contortionist will also help !

Disconnect the battery cable to avoid shorting any live electrical connections behind the dash cluster - it is not necessary to remove the dash pad, or instrument cluster to gain access to the AC/Heater control unit.

Move the front seat as far back as you can, and lie on your back, with your feet up on the seat, and get your head stuffed up under the dash - a big pillow against the pedals will help to hold your head, and support your neck. A portable light source will also be needed as it's dark behind the dash panel !

First, you will have to remove any pieces, or components that are in the way. The lower steering column cover will give you better access to the AC/Heater control unit. The control unit can be removed from the dash by loosening the two 3/8 threaded captive nuts at either side of the unit. The control unit has control cables and electrical connectors, as well as panel lights in the unit. The control unit pushes back from the dash opening and is accessible under the steel dash panel. Be very careful when you remove the unit, as the control unit photo etched faceplate is very delicate, and can be very easily damaged in the process. Replace the AC switch, and clean and lube the thumb wheel sliders while the unit is out of the dash panel. The procedure is simply reversed to reinstall the AC/Heater control unit.

It is not the kind of job that you want to do twice .

. . . hope this helps !

Edited September 4, 2015 by 68RIVGS (see edit history)

[kreed]

Randy -thanks so much for the great description . Was hoping I didn't have to take the dash pad off. My car has the center console so might pose a little more of a challenge than a bench seat but I Am going to give it a try this weekend and will let you know how it goes Thanks again - really appreciate the help. Kendall Reed

[68RIVGS]

I had removed the dash pad, glove box, 8 track player, ashtray, radio, centre AC duct, and the instrument cluster as part of a total interior refurb back in the late 80's. So it was much easier to see what went where, and how. That wire wound, cloth AC ducting can also limit the amount of working space available. 

Removing the ashtray, and radio will give you a little more access, and you can remove the control unit through the ashtray opening, after you remove the two light sockets, the electrical and vacuum connections along with the  Bowden cables. Mark them all, so they can go back to the proper position.

The shop manual has a very brief removal description, along with some illustrations that you can use as a guide.

 

. . . forgot to mention - have a box of 'band aids' on standby, as there are a lot of sharp metal edges hiding behind the dash ! 

I  admire your fortitude Ken - good luck, and keep us posted !