Try to figure out why my conversation van keeps losing the air conditioner freon. We have put the dyed in it and can not find any leaks. If help would be greatly appreciated

 

Try soap and water on connections when running. Leak could be in the evaporator under dash. Another possible leak could be the front compressor seal behind the clutch.
Rear AC?

 

If you have rear a/c, check the lines to the rear. I had an Escalade that was doing that and the line along the bottom of the car had weathered an was leaking almost as fast as I could put it in. There are block off kits to use just the front a/c if that's the case.

 

The leak may be somewhere you can't see it... Evaporator core is one place... if you have rear a/c, there is one back there too. When R12 was common, we had a sniffer for it. Just wave the wand around by the lines, or stuff it into the vents, and it would find leaks. Don't know if there is one for R134a though....

 

What year is the conversion van? A newer van probably has a pin hole from a small stone. An older one may have bad seals. I believe there are sniffers out there, but not everybody has them.