Alloytec AC clutch Issue VE

[Skaa]

Havin a bit of a drama with the AC clutch engaging full time long after the AC is switched off and no cold air. Must’ve just happened in last few weeks was going fine prior.

Appreciate if any AC gods in here can help me out

 

[krusing]

Maybe get the car scanned to see if there is any hidden faults for the HVAC, not all faults will activate the MIL,
Otherwise it sounds like its could be low in AC gas,
as these systems have a high and low pressure switches, so it will shut the system down so not to damage the hardware [Compressor, Fans, seals etc etc]
What would be the best to do is get hold a fridgy and get him to put the AC gauges on the HVAC system and check the pressures of the the high and low side,
If they are fine, most likely the Compressor could be faulty.

 

[Skaa]

Maybe get the car scanned to see if there is any hidden faults for the HVAC, not all faults will activate the MIL,
Otherwise it sounds like its could be low in AC gas,
as these systems have a high and low pressure switches, so it will shut the system down so not to damage the hardware [Compressor, Fans, seals etc etc]
What would be the best to do is get hold a fridgy and get him to put the AC gauges on the HVAC system and check the pressures of the the high and low side,
If they are fine, most likely the Compressor could be faulty.

I did plug a set of gauges in and base reading was 60 low and 70 high
Ran the motor with AC on it cycled off at 33 -195 and cycled on at 23 -145 I assumed from that the compressor n clutch was working as it shud. No click heard at the clutch just a bit of a startup noise at the bearing. These denso ac pulley assemblies visually spin full time I’m hearing is that right?
Thanks mate appreciate the gods advice in here

 

[Skaa]

AC was blowing colder in recent months perhaps a bit of a leak in the system but it seems to be holding enough refrigerant and working pressures seem normal I think. Everything seems to be working as it shud just no cold stuff blowing

 

[Skaa]

Can basic scanners pick up hvac faults? I’ll try that. Tried the rear demister relearn. I did hear all the noises in the dash, the air is channeling where it’s supposed to Maybe I’m just going a 100miles an hour backwards n not understanding hvac or compressors properly
Thanks again you lords

 

[krusing]

Based on your findings, and living in Newcastle,
say with an average Temperature of 20 > 28, & Humidity btwn 67 > 77 %

The AC Pressures should be while engine idling - Low Pressure 30 > 34 psi, High Pressure 166 > 192,
the Centre Air output Temp should be between 4.5 > 10 degree's.

 

[krusing]

Side Note,
I also found [in my VE] that the centre output temp was approx. 15deg [in January], based on a ambient air temp of 26 > 32 deg,
The Low pressure side was under 30psi, and the high pressure side was approx. 130 psi,
going by the Pressure-Temperature Relationship reference, it appeared my HVAC was low on Gas,
So I purchased a R134a can, and filler hose, topped it up,
Put the manifold/gauges on it.
And the Low Pressure increased to approx. 38 psi, the high pressure side increased to 165 psi when running.
and the centre vent output temp dropped to 4deg, so its nice and cool again,
[Where I mentioned it in another thread]
I found the location where the refrigerant is leaking,
Its on the high pressure pipe at both ends of the rubber pipe [where the compression fittings are], as I could see the fluorescent refrigerant oil [with a UV torch at night] on the high pressure pipe, as its sprayed everywhere under the harmonic balancer area.
Where I have purchased a replacement manifold, and pipes, just have to do it.

 

[Skaa]

You are a lord
I’ll check it out mate
Thanks

 

[markovr]

very common for them to leak there

 

[krusing]

You are a lord
I’ll check it out mate
Thanks

FYI
Keeping in mind, the Attachment is for a V8, in my case a L77,
Probably very similar for a V6, assuming they use the similar compressors, and different shape hoses,
but would probably same run the same pressures, being the same HVAC system installed.
I have tried to take photos of the fluoro oil for the JC members,
but the Fluorescent Refrigerant Oil is camera shy but is visible with the naked eye. , and a UV Torch.