[split082004]

AC won't blow cold. Have spent thousands at 2 repair shops. Everything has been replaced. Compressor, condenser, drier, and expansion valve. Has 2 fans. Both work. Was low on freon so added somewith leak detecting. Black light all under the hood and nothing. Even ran it for a few days to make sure. I'm at al lose. I feel like maybe it's something simple such as some sort of switch or something. No idea. It sure blows hot tho when put on heat. Any ideas are greatly appreciated.

 

[amc49]

If the blend mix door is out of whack then a/c might be working fine, the heat is just choking it.

I'll add of course that any refrigerant loss after that much work is a super issue.

 

[split082004]

If the blend mix door is out of whack then a/c might be working fine, the heat is just choking it.

I'll add of course that any refrigerant loss after that much work is a super issue.

Thank you!!! Will be checking that out this week

 

[split082004]

So I have a driver side and a passenger side. Both seem to do the same thing. Do you they they both went out?

 

[1.8TTony]

If the blend mix door is out of whack then a/c might be working fine, the heat is just choking it.

Correct. And to determine this:
1) Can you see that the a/c clutch is engaged with the a/c compressor and the clutch is spinning? If the answer is yes.......

2) Grasp the aluminum pipe which is attached to the a/c dryer........does it feel ice cold? If the answer is yes........the a/c is working.

So if the a/c system is working but you're still not getting cold air thru the vents, the problem could be with the HVAC box or the HVAC control panel/module.

There's a high pressure switch.
There's a low pressure switch.
If either of these switches are bad, it will prevent the a/c compressor clutch from engaging.

I guess......if you want to get your hands dirty....if the a/c clutch is not spinning....... you could "hotwire" the a/c clutch to force it to engage. I've done this many times on various vehicles in search of solving a/c issues.

 

[amc49]

The a/c clutch may also not work if the airgap is too wide or the magnet too weak. Sometimes it can appear to turn but partially slips, again, due to one of those things.

 

[1.8TTony]

amc49 is correct, again.

I've found that an air gap of 3mm is a good distance.

5mm air gap and the magnetic effect may not be strong enough to engage the a/c clutch.

1 mm air gap is too small and the clutch disc may contact the a/c pulley when the metals heat up (heat expansion).

 

[amc49]

!???

I've had pullover issues before nearly so big. I use .015" (.4 mm.). Nothing hits unless the dampers are dead to allow front/rear plate travel to enter . The normal optimal spec is .030". I've had too low a magnet effect at .100"

Whatever.

 

[1.8TTony]

!???

I've had pullover issues before nearly so big. I use .015" (.4 mm.). Nothing hits unless the dampers are dead to allow front/rear plate travel to enter . The normal optimal spec is .030". I've had too low a magnet effect at .100"

Whatever.

.015"....... .030"...... .100"........I don't understand inch measurements. I'm a mm measurement guy.😮

 

[amc49]

Learn BOTH. Many parts if not OEM use SAE measurement. You won't find many metric parts in a hardware store where I buy parts at 1/10th OEM prices and fix thousands of things.

.1 mm. = .004". One mm. = .040". 25 mm. is one inch. I move between both worlds all day long, all my precision measuring devices are SAE not metric. The super big web offset newspaper printing presses I worked on for 35 years also used mostly SAE measuring but you had lots of metric thrown in too.

I gave you one conversion to be able to relate it to others. Your first sentence tipped me with the 3 mm. which is a mile. one eight inch, WAAAY too big for a/c clutch airgap.

You should see me converting bearing clearances when setting up engines at rebuilds. I commonly set to ten thousandths of an inch there.

Most things in the US try to change as they might will pretty much still require thinking in SAE to get around quickly. I can just picture the look at hardware store when I ask them for a liter of acetone, or muriatic acid, pretty funny it will be.

 

[1.8TTony]

The super big web offset newspaper printing presses I worked on for 35 years also used mostly SAE.

I also worked on printing presses. Sheet fed, web and web-to-sheet. The web-to-sheet was similar to sheet fed in the sense that the end product was a stacked sheet......the web to sheet would roll out like a typical web and a knife would slice the web into a sheet..

One thing that amazed me when I first started working on the web press was wetting the web with acetone to clean the plates and the paper didn't fall apart like it would if it was wet with water. I always thought that was so cool.

Sadly, the pressman's job has/is eliminated with the advent of internet communication technology.

Kimori.
Lithron.
Heidelberg.
Kodak plates.

 

[amc49]

Goss Suburban, Urbanite, Rockwell C-150 (modified Goss Community with bearers for 4C heatset), Miehle, Hantscho, Baker-Perkins, Harris M-1000, Harris V-15, Web leader.

Coldset for most of my experience then went into heatset 4 color for about 7-10 years. I ran 3 vertical C-150s in parallel to get up to 9 webs (4 pg. tab X 9 = 36 pg. book) of 4 color newspaper inserts. Lots of other parallel work on the others too. The Web Leader was used on quick timeline instant turn financial for Wall Street, we often had to create, print, bind, post and ship financial documents overnight to be delivered on Wall Street by 9 in the morning and countless other places in the world (from D/FW Texas).

You are right, as said in Ghostbusters 1, 'print is dead'. Here much of the work went to south Texas then the pull of cheaper across the border yanked much of it there, what did not outright die. I at one time printed much of the phone directories for the upper east coast and around Chicago, when was the last time you saw a phone book?

 

[amc49]

Yep, we wet webs with acetone too but on the heatset you had to make sure the oven doors were wide open or the vapors would ignite inside the ovens, not good at all. I was always amazed at the concept that if the web was dead in square with all tiltboxes squared up you could put 300 pounds of tension on a running web and it ran all day long fine at 70,000 iph. Or, perfing to make coupons maybe 2X3 and the web again runs at top speed with a million holes punched in it. .

 

[1.8TTony]

Or, perfing to make coupons maybe 2X3 and the web again runs at top speed with a million holes punched in it. .

The clearance tolerances of the perf and slitter blades. So precise.....and to watch them doing their thing at max speed. Just a blur.

Ring & pinion gears on the drive shafts similar to those in a vehicles axle.

I used to work at Paradise Post Printing when Donrey Media Group owned it. It was a "round the clock" operation. Three shifts doing everything........heat set, cold set, coating, book binding, stapling, newspaper, flyers, business cards, magazines, etc.....

Most advanced press I operated was a Lithrone. So easy to operate. Once you're set up & ready to do a run, the Lithrone computer system manages every thing. It manages plate adjustments, ink key adjustments, coating adjustments, heat settings. Like literally, once it gets running, all ya gotta do is feed the machine stacks of paper. It even has ink level monitors which dispense ink when levels get low. If there were any misprints for whatever reason, the Lithrone would place a tab of paper before the first misprint copy and a tab of paper after the last misprint copy. After the run, you just discard the easily identified misprints.....no need to scoop them out of a stacker while the machine is running.

 

[amc49]

Nice and time to adjust things. One of the presses I ran used 40 inch diameter rolls 70 inch wide in pairs, every 11 minutes you spliced both. The roll tender worked his butt off. I did too even with all computer ink setting and register, the paper at that speed becomes a living thing. Super-cal paper (fake coated, polished by pressure only) grades A-C and the A went as samples and store handouts and the C went direct to mailers to lower paper cost and cheat the customer (I didn't make the rules). A printed like coated as far as color but C was like printing uncoated and you completely reset the ink. Record on that press was 850,000 copies in one day. I held the C-150 record at 372,000 in one day 12 hrs. 24/7 schedules, we worked rotating 3 on 3 off. Retail Graphics in the late '80s, they went from number 480 or so in the top 500 printing companies in the US down to number 20ish in that 3 years. The financial company I printed for did close to the same and dropped down under number 20 overall, Merrill Corp. Neither company exists any longer, those guys at the top press super hard and sold companies quick to make billions.

The financial group was owned by Donaldson, Lufkin, and Jenrette, who in turn was owned by Credit Suisse who showed up in the news this week. They pulled some stunts in our last 2 years and it was fine to see them get some of what they deserve.