Why Won't my A/C Take a Charge? Please Help
07-15-2009, 10:49 PM
#1
Why Won't my A/C Take a Charge? Please Help Ok after getting my motor put in a 2000 TA ,I Tried to Charge my A/C and It won't take Refrigerant? A/C on Max Fans going full blast(Blowing Hot air in the car).I noticed that my Compressor wasn't kicking on,I checked all the fuses..Does this have to do with no Refrigerant in it?I let can set upside down for 15 min or so and it won't take it.Yes this is plugged into the low side.Thanks
07-15-2009, 10:53 PM
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it will take refrigerant without the compressor on. The system has a low pressure switch that shuts it down if the pressure is low. When the compressor cuts on that means you are getting somewhere. Are you sure you pierced the can? you have to pierce it then unscrew the pin out of the way to let the freon by.
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07-15-2009, 10:53 PM
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if there is no refrigerant in the the system and the compressor is not kicking on its not going to suck the freeon . You need to evacuate the system vacuum it and then recharge it .
07-15-2009, 11:31 PM
#5
Recharging through the cans that you can get at wal-mart is a big no no. Take it somewhere have them recover - deep vac - and then charge the HIGH SIDE. like the two posts above me said.
Mike
Mike
07-16-2009, 03:03 PM
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07-16-2009, 06:14 PM
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if the system has zero/low pressure and the can has high/higher pressure then they will equalize themselves by simple laws of physics. Ask me how i know, i have serviced vehicles with low freon. After you get the low pressure sensor to power the compressor up, the compressor will come on...How would this happen if it wasn't taking freon?
07-16-2009, 06:56 PM
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Universal CFC/HCFC refrigerant certified since March 2004!
07-17-2009, 07:47 AM
#11
I see more people at my shop that overcharge or contaminate the a/c system because they want to save some cash and use the cans at an autoparts store. Funny thing about us is that we spend a lot of money to make our cars nicer the right way, but will try to take a cheap way out on maintenance areas. With a/c you are better and safer to just take it to someone who has the machine to do it right the first time. It should be charged on the high side which is impossible to do with the cans. Also the system needs to cleared out and deep vacuumed for a minimum of ten min, and then hold -30 on the vacuum gauge for a minimum of 30 min. with the pump off. After that you recharge, and with the system being in a vacuum, then freon runs right in with in a matter of a couple of seconds.
07-17-2009, 09:56 AM
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Also the refrigerant work without certification and/or the release of r134a outside de minimus requirements is in violation of EPA regs if caught/found out it is a very hefty fine at a minimum!
07-17-2009, 01:23 PM
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If you need to fill via the low side port, you may
have to jumper the low pressure switch to get the
compressor to run. A one-hose Wal-Mart kit will
only give you a low side compatible fitting. A set
of manifold gauges is relatively cheap (like $49
or so at Harbor Freight) and you can judge the
fill by when low side pressure starts to come up
off the "floor" when running max cool, mid throttle
(where low charge would let it pump it all to the
high side). All you really need is enough that you
don't continually cycle the compressor from
underpressure; more helps none (other than,
some increased time-to-next-fill if you leak).
have to jumper the low pressure switch to get the
compressor to run. A one-hose Wal-Mart kit will
only give you a low side compatible fitting. A set
of manifold gauges is relatively cheap (like $49
or so at Harbor Freight) and you can judge the
fill by when low side pressure starts to come up
off the "floor" when running max cool, mid throttle
(where low charge would let it pump it all to the
high side). All you really need is enough that you
don't continually cycle the compressor from
underpressure; more helps none (other than,
some increased time-to-next-fill if you leak).
08-17-2020, 12:34 PM
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High side out of all mechanics and information I've read online says DO NOT CHARGE THE HIGH SIDE ALWAYS LOW SIDE/PORT.
08-17-2020, 02:21 PM
#15
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11-09-2022, 01:02 PM
#16
I see more people at my shop that overcharge or contaminate the a/c system because they want to save some cash and use the cans at an autoparts store. Funny thing about us is that we spend a lot of money to make our cars nicer the right way, but will try to take a cheap way out on maintenance areas. With a/c you are better and safer to just take it to someone who has the machine to do it right the first time. It should be charged on the high side which is impossible to do with the cans. Also the system needs to cleared out and deep vacuumed for a minimum of ten min, and then hold -30 on the vacuum gauge for a minimum of 30 min. with the pump off. After that you recharge, and with the system being in a vacuum, then freon runs right in with in a matter of a couple of seconds.
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