Search found 39 matches

by 70monte
Sat Aug 13, 2022 8:23 pm
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: Evacuation Procedure
Replies: 3
Views: 888

Re: Evacuation Procedure

"Your Mileage Might Vary," as the expression goes, but I normally try to evacuate a system for a minimum of one hour. Special circumstances can and do present themselves, though. For example, if a vehicle with an A/C problem comes along and the owner needs it back in about two hours, that...
by 70monte
Sat Aug 13, 2022 2:08 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

Tim wrote: Sat Aug 13, 2022 9:59 am
70monte wrote: Sat Aug 13, 2022 8:17 am Yes, I know who Tim is. I've seen him post on the forums for years and I have bought parts and tools from him over the years as well.

Thanks for all of the info. I will just plan to vacuum longer in the future.
I recognized you. Think we go back to the original BAT Auto.
Yes we do.
by 70monte
Sat Aug 13, 2022 8:17 am
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

Tim is the site owner, and runs AMA, Arizona Mobile Air. He is very good. That procedure is such that we suggest it is OK for a fresh clean dry system that has not been flushed and blown dry. Flushing and blow drying with shop air is a whole different story, Shop air is LOADED with moisture. I have...
by 70monte
Fri Aug 12, 2022 10:59 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

I forgot to mention that Tim, a moderator here posted this https://www.autoacforum.com/viewtopic.php?f=4&t=13603 information in the AC procedures forum which was updated in 2020 because it's basically the same info I printed out in 2006 when I first joined and he states that 30 minutes of evacua...
by 70monte
Fri Aug 12, 2022 10:52 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

Just for the record, a vac time of 30 min is never enough. Moisture will not boil off until 29.9, and once you hit that number, it takes time to get all the water vapor out. Not sure why people rush this important step. The better the vac the better the system will run, and the longer it will run, ...
by 70monte
Fri Aug 12, 2022 7:03 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

Glad it is working but the system is wet. No where near sufficient vacuum time Well, unfortunately I did not see your post about vacuuming for several hours until after I had done the job. He is happy with the performance and actually thinks it's too cold so I guess the next time I run into this, I...
by 70monte
Fri Aug 12, 2022 5:07 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

Latest update: AC seems to be fixed. The owner got everything flushed and put back together and dried out with filtered shop air. He brought it over and I put the vacuum pump on it and vacuumed it down for 30 minutes and let it sit for 30 minutes. Gauges never dropped at all during the 30 minutes. I...
by 70monte
Fri Aug 12, 2022 12:56 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

Blow it out thoroughly and repeatedly, preferably with nitrogen. Because the evaporator is designed as a low-pressure component, I use no more pressure than 100 PSI to be on the safe side. Lacking a nitrogen set-up, you'll have no choice but to use shop air—the dryer and more filtered, the better. ...
by 70monte
Thu Aug 11, 2022 2:13 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

JohnHere wrote: Thu Aug 11, 2022 12:37 pm If you flush the evaporator in situ, try to ensure that you get out all of the flushing chemical, which will cause problems if you inadvertently leave any of it in there.
Thanks. Hopefully we can.
by 70monte
Thu Aug 11, 2022 12:27 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Ford F350 AC issues.
Replies: 45
Views: 3178

Re: 2007 Ford F350 AC issues.

If it's a parallel-flow condenser--and it most likely is--it really can't be flushed. Good decision on replacing it especially since you've taken it this far. Would be a shame not to replace it, and then the compressor gets ruined again. I also advise replacing the accumulator because moisture will...