Search found 595 matches

by bohica2xo
Sat Jun 15, 2019 6:43 pm
Forum: Automotive Air Conditioning Forum
Topic: another hybrid system question change from fixed orifice to TXV
Replies: 2
Views: 202

Re: another hybrid system question change from fixed orifice to TXV

A TXV requires some sort of freeze protection. The low side cycling switch from the orifice tube system will do just fine.

Swap the OT for a TXV. Keep the cycling switch. Add a receiver dryer to the liquid line.
by bohica2xo
Sat Jun 15, 2019 6:39 pm
Forum: Automotive Air Conditioning Forum
Topic: Evap freezing at low fan speeds
Replies: 8
Views: 428

Re: Evap freezing at low fan speeds

If the vehicle was equipped with a freeze switch on the evaporator, then it never had a variable displacement compressor. The two systems are mutually exclusive.
by bohica2xo
Sat Jun 15, 2019 6:36 pm
Forum: Automotive Air Conditioning Forum
Topic: Dodge Ram not charging
Replies: 5
Views: 214

Re: Dodge Ram not charging

Common fault is service connectors that are not depressing the Schrader valves on the vehicle fittings. You evacuated the manifold & hoses. Then you charged the manifold & the hoses. A little bit of refrigerant will slip past a closed Schrader valve, so some pressure may have entered the sys...
by bohica2xo
Sat Jun 15, 2019 6:29 pm
Forum: Automotive Air Conditioning Forum
Topic: 2018 Peterbilt Not Cooling
Replies: 3
Views: 32

Re: 2018 Peterbilt Not Cooling

Check the clutch gap as well. A class 8 truck picks up a lot of miles in a year.
by bohica2xo
Fri Mar 15, 2019 5:54 pm
Forum: Automotive Air Conditioning Forum
Topic: shelf life opened DEC pag 100
Replies: 2
Views: 206

Re: shelf life opened DEC pag 100

DEC PAG is good to go. It does not suck up water like the old SEC stuff did.

Test at link

https://www.autoacforum.com/messageview.cfm?catid=20&threadid=17571
by bohica2xo
Mon Mar 11, 2019 10:16 pm
Forum: Automotive Air Conditioning Forum
Topic: hybrid system 1980s/1990s questions
Replies: 10
Views: 604

Re: hybrid system 1980s/1990s questions

Some of those cars had A6 compressors, some had R4's. Since they were CCOT already, you just need to connect the new compressor. Use a new accumulator, they are 134a compatible. Use the OEM size White .072 orifice tube. The original condenser for that car was a tube & fin. You will probably ne d...
by bohica2xo
Mon Mar 11, 2019 9:58 pm
Forum: Automotive Air Conditioning Forum
Topic: Ford C350 Dual Air - trouble
Replies: 34
Views: 1772

Re: Ford C350 Dual Air - trouble

Nice. A true parallel flow unit as a replacement. The best heat exchanger available for MVAC at this point in time. If you look closely at the headers you will see the dividers. The refrigerant makes passes from one side to the other through some of the tubes, and back across through others. Your re...
by bohica2xo
Mon Mar 11, 2019 9:15 am
Forum: Automotive Air Conditioning Forum
Topic: Ford C350 Dual Air - trouble
Replies: 34
Views: 1772

Re: Ford C350 Dual Air - trouble

Yeah, aftermarket installs can be a puzzle like that. I have a 1993 F150 with dealer installed A/C. Only the dryer is OEM... The good news is you got the dryer drilled & measured. The fact that it had that much oil when it locked up says it was not grinding itself to death, so the evaporators sh...
by bohica2xo
Mon Mar 04, 2019 1:23 pm
Forum: Automotive Air Conditioning Forum
Topic: Ford C350 Dual Air - trouble
Replies: 34
Views: 1772

Re: Ford C350 Dual Air - trouble

Overall not a lot of oil in the system. There is flow at the rear TXV anytime the compressor is running. Usually there is some oil built up in the rear system if the rear blower has not been running. If you get the lines cleared out then you have a pretty much oil free system. Something to know when...
by bohica2xo
Mon Mar 04, 2019 9:44 am
Forum: Automotive Air Conditioning Forum
Topic: Ford C350 Dual Air - trouble
Replies: 34
Views: 1772

Re: Ford C350 Dual Air - trouble

Plan sounds ok to me. Obviously that plastic made it all the way from the compressor to the back of the vehicle - through the condenser. A great example of why we say flushing is a good idea. How much oil was present at the TXV? The insulation on the lines & the TXV is called Presstite. It is a ...

Go to advanced search