gs450h AC compressor

[carnut1980]

Hi all, My gs450h 's AC system doesnt work. There is a leak, and the system doesnt hold pressure.

When i switch the AC button on, i don't hear any difference in engine note, but then these hybrids don't have rev counters, and don't rev like standard petrol car when in neutral.

Would the compressor itself be the source of a leak, through a seal maybe? I'm sure the condensor is a possibility as well

I have techstream software, is this likely to help though?

Also, is the AC compressor powered by a drivebelt, or by the traction Battery. 

Is a compressor swap a big job?

thanks

[AmbroseJohn]

The AC is driven by electric from the traction Battery, so the AC still works whilst the petrol engine is not running. The power steering and brake assist are also electric for the same reasons.

[carnut1980]

Thanks ambrosejohn.

Is there any way i can test the compressor in situ?

or indeed, if i remove it? will it power up on a 12v feed?

I just don't want to buy another compressor (£200 second hand), before i know for sure that its the cause.

I do have code B1423, 'open in pressure sensor circuit/unusual refrigerant pressure', which i kind of guessed beforehand.

Where would you go from here?

cheers

[AmbroseJohn]

Most garages will check your system for leaks. It could be something simple, like a loose joint.

 

It may just need re-gassing. They check for leaks during the process because they're not allowed to put refrigerant into a system with a leak.

[carnut1980]

Thanks. I know most garages will check for leaks.

they have done, and there s a leak. 

How can i visually inspect the compressor?

[AmbroseJohn]

They usually put a dye into the system, then run it to see where it comes out. It's all done on the same machine, so I'm surprised they didn't do it there and then. 

[carnut1980]

They did, but because of all the covers and trims, and they were quite busy, they only could get at some parts of the condenser, and didn't see any dye, though visibility wasnt great. Would the dye still be present, 2/3 months on? I have a UV light and more time than they do, to thoroughly check? cheers