I recharged my AC myself with one of those cans of
EZ Chill R134a.
Here's what happened: after about 5 minutes of releasing the
refrigerant into the low side fill input, I got it to the roughly
psi pressure recommended for this, a 2005 Lincoln Town Car.
Now I have a new problem: the clutch clicks every 5 seconds or so,
and, with the gauge attached, I see the pressure go up to 55 then down
about 15 with each click, then back up again and so on over and over
And sure enough, the AC does not blow cold inside. I did everything
"the can told me" and I know I released the refrigerant into the right
Why is the pressure varying so much with the clicks and how come no
col air? The can still has refrigerant in it.
Upon initial measurement with the gauge, the pressure was barely 10-15
Thanks in advance to anyone who can help.
On Sat, 26 Feb 2011 13:38:20 -0800 (PST), The Derfer
When the pressure goes down to 15, what is the high side pressure? You
may not yet have enough gas in the system, or a plugged expansion
orifice. I'm betting on the former. And do you have any idea what
happened to the gas you're having to replace? If you have a leak,
adding more 134a is just being wasteful. I suspect you have a slow
What's happening is that the compressor clutch is engaging, and then
it's being disengaged when the system pressures don't come up properly.
This could be because there is a clog in the system, it could be because
there is too little freon in the system, or it could because there is
too much. Or maybe a pressure switch is bad.
You need to be able to measure both the high and low side pressures in
order to make a real diagnosis.
"C'est un Nagra. C'est suisse, et tres, tres precis."
It sounds like you don't have enough freon in the system yet, but I've
also seen where too much freon causes this problem too.
Did that can of EZ chill have a stop leak built in?? It's possible
your orifice tube might be clogged.
The can does feature stop-leak, for whatever that's worth.
Now I've emptied the rest of the can in there. The pressure goes up
to 55 psi, clicks, goes down to ~15,
then goes steadily back up, repeats this over and over.
I don't have anything that will fit the high side to measure that.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.