Ryan
I had a problem with the #3 speed not working and replacing the #13 relay on the left D pillar solved my problem.
You can find that relay on some junkyards or maybe Bus Depot.
Bob
 
http://idiopath2018.wordpress.com

> On 19, Feb2019, at 3:51 PM, Ryan Cresawn <jrcresawn@GMAIL.COM> wrote:
> 
> My 1991 Vanagon Westfalia Camper has a 4-position fan speed selector for
> the air conditioner. The 2.1l engine is stock, but the air conditioner
> compressor was replaced years ago with one compatible with R-134a. In
> November I replaced the condenser and pulled a vacuum on the system for
> five days. Then I disconnected the A/C gauge set and vacuum pump. Last week
> I took my Vanagon to a local air conditioner repair shop. They charged the
> system and added oil. The air conditioner cools well, but I discovered on
> Monday before sunrise that my only working fan speed is 4. All four fan
> speeds worked prior to November of last year when I stopped using the air
> conditioner. Should I take it back to the shop to ask them about the fan
> speed selector or try to identify the cause of the problem and repair it?
> Any suggestions on where to begin the troubleshooting?
> 
> Thanks,
> Ryan