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Discussion Starter · #1 ·
Thanks for reading.

Supposedly the compressor is "seized" but I'm not sure I believe it so would appreciate your thoughts.

I'm aware we have a slow leak in the aircon system somewhere. This is due to a regas about 10 months ago and over the past month it has progressively been blowing less cold. It now just blows ambient temp air.
I took the car to an aircon and radiator service shop today.

I was told the compressor is seized based on, ..
the centre nut on the flywheel was not turning with the wheel. ?

The guy explained, which I know, that some cars use a clutch mechanism and only pump when the clutch is engaged.
Others spin and are effectively pumping all the time but only allow gas into the compressor when needed.
Now supposedly there is the centre shift, which he calls the link, that rotates constantly, but if something goes wrong internally, this link shift snaps intentionally so the flywheel can keep spinning with the belt so as not to interrupt the other components that rely on the belt turning.

Hope I'm making sense so far.

So what he said is, because the centre bolt in the flywheel is stationary while the flywheel is spinning with the belt, the compressor must be seized up and needs to be replaced.

What I'm wondering though, is if there is no gas in the system, would the appropriate sensors have detected this and thus have disengaged the compressor altogether. ?

So if we just regas the system, the sensors will detect pressure, and the compressor will start working again ?

Or, is what this bloke is telling me, that because the centre bolt is not spinning when the flywheel is spinning, means the compressor is seized ?

Thanks
 

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If the compressor continued to run without gas, but ultimately without the oil, then the compressor will burn out rather quickly and takes damage internally. Nearly all cars have a sensor to stop (might be on the compressor itself towards the back on your model) on the low side when a no gas situation happens and your thinking is correct, in that, while there is no gas in the system the clutch will not operate. So is he trying to rip you off, this hard to tell, on one hand, he is offering the best possible outcome for you, a working system that will last, on the other hand I can't follow or agree with his explanation.

I would get a second option before investing in a fix.

Basically, how it works
Line Font Auto part Engineering Machine


How the compressor works
Automotive tire Motor vehicle Automotive design Rim Font


If the valves are damaged or associated parts (valves are not like engine valves, more like flaps of spring steel), assuming they have taken damage, these broken bits all accumulate in the dryer and this should be replaced as well ~imo

The clutch coil is electronic but as mentioned earlier it has failsafe for no gas on nearly every modern car from 1990's onward.

What engine is it ?
Hope you find this helpful
 

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Discussion Starter · #3 ·
Appreciate the reply RedSector.

It is a 1.6 Petrol if that is what you are asking.

I am taking it to another outfit tomorrow, will be interested to see what they say. Will drop a note back here accordingly.

Cheers
 

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An easy check.
Have you checked for error codes using an OBD reader?
My T7 308 A/C stopped working and only by chance did I connect my OBD reader up and it reported an error with the thermostat!
It appears that the A/C relies on a switch in the thermostat. Sorry, I can't remember the code.
My A/C came good after I purchase a new thermostat and before I could fit the new thermostat.
 
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