AC York Compressor Clutch Acting Up!!!

[Peter Golledge]

Probably explains how many A/C systems get messed up though also... a 
single port means no High & Low measurement which makes it hard to 
figure out if you have a clogged orifice tube or a failing compressor etc.

I do use a discarded digital package scale to liquid fill by weight but 
only after confirming the system is really down on pressure and then 
finding the leak.  The last couple of leaks I have had were in 
fittings/hoses disturbed during maintenance.



On 3/19/2012 8:28 PM, Mark Rosenkrantz wrote:
> Huw is absolutely correct... a good modern machine is in the $4500. range.
> But it's hook up, hit some buttons, and walk away.
>
> Mark
>
> On Mon, Mar 19, 2012 at 9:51 PM, Huw Powell<audi at humanspeakers.com>  wrote:
>
>> But with a modern AC machine that's trivial to do - an hour, mostly
>> unattended.  And dye goes in with the correct recharge, so the leaking
>> component can be identified for replacement estimates.
>>
>> On 3/19/2012 9:42 PM, Mark Rosenkrantz wrote:
>>
>>> There are 2 ways to do it correctly.  One is with guages hooked to both
>>> the low pressure and high pressure ports.  This is standard on most
>>> cars.  VAG only has one port (officially, but some cars can have a port
>>> attached at the compressor for high pressure) and the only way to charge
>>> a stock car is to completely evacuate the system and then fill with a
>>> measured amount.  Both under charging and overcharging is poor for
>>> performance as well as the compressor itself.
>>> I think this is STUPID as there's no way to "top off" a system after
>>> years of service (IMHO, all systems leak a little over time).  For
>>> example, my Escalade needed topped off after about 6 years.  Just a
>>> little, but it was needed.  Nothing "wrong" with the truck.  VAG's
>>> procedure would have been a full evacuation and recharge from a scale.
>>> Mark Rosenkrantz
>>>
>>> On Mon, Mar 19, 2012 at 8:30 PM, Bill Green<wgreen56 at tampabay.rr.com
>>> <mailto:wgreen56 at tampabay.rr.**com<wgreen56 at tampabay.rr.com>>>  wrote:
>>>
>>>     Maybe so I'm no professional that's for sure. My only experience is
>>>     with my
>>>     own cars. I have a set of gauges I use because there's no way for me to
>>>     monitor how many ounces are actually in a system, whereas I can always
>>>     monitor pressure to let me know if the system is fully charged.
>>>
>>>
>>>
>>>     -----Original Message-----
>>>     From: Huw Powell [mailto:audi at humanspeakers.com
>>>     <mailto:audi at humanspeakers.com**>]
>>>     Sent: Monday, March 19, 2012 9:56 AM
>>>     To: Bill Green
>>>     Cc: quattro at audifans.com<mailto:quattro at audifans.com>
>>>     Subject: Re: AC York Compressor Clutch Acting Up!!!
>>>
>>>     I thought AC charges were supposed to be measured to spec, like, say,
>>> 20
>>>     ounces of refrigerant?
>>>
>>>     On 3/19/2012 6:35 AM, Bill Green wrote:
>>>      >  "I guess I wasn't clear... I meant under what conditions is it
>>>      >  *supposed* to turn itself off (like high engine temps?)."
>>>      >
>>>      >
>>>      >
>>>      >  It is designed to turn itself off when under-pressurized or
>>>      >  over-pressurized. Maybe you do not yet have enough R134a in system?
>>>      >  Possibly the pressure only rises enough when above 1500 rpm? Just
>>>     a guess
>>>     really.
>>>      >  Maybe you should buy or borrow a set of gauges to monitor the
>>>     pressure
>>>      >  as you charge it.
>>>
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