Search found 339 matches

by bohica2xo
Mon Jun 18, 2018 8:19 am
Forum: Automotive Air Conditioning Forum
Topic: No low pressure
Replies: 9
Views: 122

Re: No low pressure

I just re-read your posts. A test with new gauges gave the same pressure on both sides, I should have caught that. But your last post says: if you shut the high side gauge down as if your going to charge it the low side pressure drops to zero. High side does not change. Also notice that when I disco...
by bohica2xo
Mon Jun 18, 2018 8:09 am
Forum: Automotive Air Conditioning Forum
Topic: Very high High Side Pressure
Replies: 4
Views: 68

Re: Very high High Side Pressure

Is the new condenser the same as the old unit? A 1997 would have had a serpentine condenser about 1.250 thick. I have seen replacement condensers that are parallel flow units about .75 thick - just like the 2002 & up units. The parallel flow condenser is a good one, but it holds less refrigerant...
by bohica2xo
Sun Jun 17, 2018 8:07 am
Forum: Automotive Air Conditioning Forum
Topic: No low pressure
Replies: 9
Views: 122

Re: No low pressure

Does the evaporator have a TXV? The compressor may not be bad. Which model Sanden is it? I would probably recover the system to see how much chage remains, and inspect the expansion device. I would also open the suction line at the compressor. You want to see a little oil film in the suction line at...
by bohica2xo
Sat Jun 16, 2018 2:46 pm
Forum: Automotive Air Conditioning Forum
Topic: 1967 Catalina AC Help/Advice
Replies: 7
Views: 100

Re: 1967 Catalina AC Help/Advice

When I see a POA system with 29psi low & 155 psi high, all I see is an evaporator with no airflow. Is the suction side cold? Do you have a low side port on the compressor side of the POA? Not all systems have this, but some do. If you raise the engine RPM to 1500+ does the evaporator stay at 29p...
by bohica2xo
Fri Jun 15, 2018 10:41 pm
Forum: Automotive Air Conditioning Forum
Topic: No low pressure
Replies: 9
Views: 122

Re: No low pressure

Pushers are always a handful with A/C. Is this the dash A/C you are working on? The long lines & odd configurations that are manufacturer specific can lead to some odd pressure readings. Are the service ports both back at the compressor? Sometimes you will find a low side port near the evaporato...
by bohica2xo
Fri Jun 15, 2018 10:37 pm
Forum: Automotive Air Conditioning Forum
Topic: Problem with testing polarity on A/C clutch coil
Replies: 5
Views: 49

Re: Problem with testing polarity on A/C clutch coil

Because a diode tested by itself will give a resistance higher than the coil in either direction on your DMM, you need to apply a small load to cause current to flow through the diode. The resistor is used to build a voltage divider. With the coil & diode assembly connected as one of the two res...
by bohica2xo
Fri Jun 15, 2018 8:46 am
Forum: Automotive Air Conditioning Forum
Topic: No low pressure
Replies: 9
Views: 122

Re: No low pressure

The 1999 Safari is built on the GM P32 or Workhorse chassis. HT6 compressor.

Coach builders did all sorts of things with the dash A/C If they used mostly the GM P series parts it has an orifice tube.

Which engine is in this unit?
by bohica2xo
Fri Jun 15, 2018 8:34 am
Forum: Automotive Air Conditioning Forum
Topic: 03 honda civic ac
Replies: 1
Views: 31

Re: 03 honda civic ac

You say it works "All Day" Does this mean that when you drive it for several short trips in the daytime it always cools? Or is this car used like a delivery vehicle running almost constantly? When it stops working at night, does this coincide with an action like using the headlights? What ...
by bohica2xo
Fri Jun 15, 2018 8:27 am
Forum: Automotive Air Conditioning Forum
Topic: Problem with testing polarity on A/C clutch coil
Replies: 5
Views: 49

Re: Problem with testing polarity on A/C clutch coil

Always a tricky test. Because the coil & diode are in parallel, the resistance through the coil is the same both directions. But the diode has a 0.5v drop one direction, and is effectively an open circuit the other direction. A DMM will not display the very small change when switching polarity. ...
by bohica2xo
Thu Jun 14, 2018 5:56 pm
Forum: Automotive Air Conditioning Forum
Topic: Strange compressor behavior Volvo V50
Replies: 7
Views: 129

Re: Strange compressor behavior Volvo V50

Oh, it definitely has broken valves with a full charge and no differential. There is crap in the system. Several broken reed valves went someplace. Pull the discharge line out of the vehicle. Put one end of it in a clean container & flush it out with a spray can of brake cleaner. See what you ge...

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