Would have been r-12 to start with. Its not very likely that it is still filled with the R-12.
At present it doesn't seem to have any refrigerant. I hope it hasn't been converted from R-12, but on the other hand it will be easier to service if it has been.
Title: Re: w1993 U240 Dash Air
Post by: Michael Riensche on July 01, 2025, 05:37:41 pm
RandallBrink, if you want, take a picture of your access ports in the front hood area. If it's been converted, we should be able to tell what it had in it before it leaked. If it's 134a, it should have 134a connections. Let's hope anyway.
Title: Re: w1993 U240 Dash Air
Post by: kgrover on July 01, 2025, 10:36:49 pm
I'm not sure where you would find R-12 anymore.
Environmentally Friendly Refrigerant and Automotive Fluid Products -... (https://www.es-refrigerants.com/?site=dom)
I've used this company for refrigerant before and I like their stuff. They can help you get whatever you need.
Title: Re: w1993 U240 Dash Air
Post by: Unclebob9 on July 02, 2025, 10:56:38 pm
check the fittings, 134a converted are different than 12R, You can still get 12R, but if you intend to keep it have it converted. My 96, when I bought it, the A/c did not work, so I replaced the compressor, no good. the dryer had ruptured and the little Beads made it all the way to the front of the coach, going under the dash, disconnecting the lines, loading it with carb cleaner and using compressed air to try to push out all the little dryer beads from both directions for over 4 hours, I finally got it to break through and the little beads came flying out, continued to flush it for another 30 minutes until no more beads, put it all back together, dried it out, new dryer, re-charge and finally got it working. However, it is really only adequate when sitting in the front seats. running the generator and the two rooftop A/C's works better to cool the entire motorhome. It was an absolutely miserable job.
Title: Re: w1993 U240 Dash Air
Post by: RandallBrink on July 03, 2025, 02:45:08 pm
check the fittings, 134a converted are different than 12R, You can still get 12R, but if you intend to keep it have it converted. My 96, when I bought it, the A/c did not work, so I replaced the compressor, no good. the dryer had ruptured and the little Beads made it all the way to the front of the coach, going under the dash, disconnecting the lines, loading it with carb cleaner and using compressed air to try to push out all the little dryer beads from both directions for over 4 hours, I finally got it to break through and the little beads came flying out, continued to flush it for another 30 minutes until no more beads, put it all back together, dried it out, new dryer, re-charge and finally got it working. However, it is really only adequate when sitting in the front seats. running the generator and the two rooftop A/C's works better to cool the entire motorhome. It was an absolutely miserable job.
Indeed, it may not be worth it if it is that much complicated than simply recharging the system. Thanks!
Title: Re: w1993 U240 Dash Air
Post by: RandallBrink on July 03, 2025, 02:45:41 pm
RandallBrink, if you want, take a picture of your access ports in the front hood area. If it's been converted, we should be able to tell what it had in it before it leaked. If it's 134a, it should have 134a connections. Let's hope anyway.
Will do that. Thanks.
Title: Re: w1993 U240 Dash Air
Post by: red tractor on July 03, 2025, 07:00:05 pm
Our 97 u270 the drier had ruptured and plugged the expansion valve. I tried blowing from each direction and was unable to get it to break free. I finally decided that I would bite the bullet and pull a new line. I took it loose in front and pulled it down through the floor and the beads came rolling out. I then used nitrogen to blow each direction. Installed a new expansion valve and drier and have cold air for the 2 people in the front seat.