Question about 2001 Toyota RAV4

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How many cans of freon can be added? Don't want to hurt a/c with over amount? 2 cans were added and helped a lot, would 3 be ok?

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1 to 1 1/2 is the avrage but all u need to do is make sure u stay in the green on the gage when filling the ac system, if you are looking for colder air there is a aditive you can put into the ac system to boost the cooling effects autozone carries it. hope this helps

Posted on Jul 15, 2010

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Posted on Jan 02, 2017

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2 Answers

Why wont a/c clutch stay engaged


You dont have enough refrigerant in it. Go to wal-mart and by a recharge hose and a can of freon, If you do not have any leaks, and system is ok. Then by adding the proper amount of freon, should keep the a/c clutch from recycling. Good-Day! It will tell the proper way to fill it on the guage for the freon.

Aug 03, 2014 | 2001 Toyota Echo

2 Answers

What does a new air compressor need before adding frion


did you read the FSM yet or at alldata.com yet,then ask about steps
there that are confusing, or ??? any thing?
air? what air?
the steps for A/C HVAC are all the same.
1: capture the old Freon (liquid gold) or go to jail. (USA)
2: run cleaner through system, to get the debris from death of old compressor out, (if the expansion valve is packed it's hopeless)
3: back together. now. with new receiver dryer.
4: pump it down with the vacuum pump, this removes all moisture , that kills Freon(tm) Dead. A/C loop hates water, in any form.
5: Add the R134 oil. (new unisiveral type)
6: add the freon by weight, do not overfill. FSM tells this,,,, read it.
7; Run it and adjust freon amounts, per the tables in the FSM.
The table shows 2 things, (input) air temp, and humidity, then adjust
pressure per chart.
8: using a vent thermometer check that the system really is at spec.

(i do the elect side, the above, is the loop side. and above is SHORT LIST)

Jun 23, 2014 | 2005 Nissan Altima 2.5

2 Answers

What's your problem?ac compresor seems like dont recive energy


There are 2 safety switches in most A/C systems. A high and low pressure sensor will cut off the Compressor clutch. You can borrow a gauge set, called Manifold gauges, from tool loaner programs at Autozone, Advance, or Oreilys autoparts.

There are several ways to try to fix this. It depends on what the pressure gauges show.

If the pressure is low, but not empty, there is hope. The old Freon leaked out. It will happen again. But there are products which can plug some leaks. Then add Freon using the gauges. The ideal amount is an amount that makes the compressor stay on the longest. There are gauges that can tell you, color coded, and reasonable priced.

If the system is completely empty, it is contaminated with outside air. The Freon will not function correctly if added and a new Dryer(A/C part) should be installed. There is a Vacuum pump which must be attached to draw down the system to a negative vacuum. So even changing a part will not decontaminate the system without the pump. Pump can be loaned from Autozone with big deposit which is returned, no hassle. Some parts require special pliers and "O" rings to reinstall.

The price of Freon has skyrocketed. What once costed $12 to refill a car now costs $50. So going to a repair shop can be a better idea if you waste Freon doing it yourself. If you don't repair the leak, imagine $50 evaporating into the wind with the Freon.

Apr 14, 2012 | 1994 Buick LeSabre

1 Answer

Not getting cold added three cans coolant no different


My question to you would be are you adding "coolant" to your engine (anti freeze or water) or are you adding freon to your A/C (tip off was the 'three cans').

If you are adding engine coolant, - that is a lot, 'three cans' - and your engine is still over heating, you should get your system evaluated by a pro.

Working on automotive AC is dangerous for the amateur. For starters, amateurs (like me) usually don't have the equipment required to properly evaluate the status of the charge in a automotive AC system. Over charging a charged system is dangerous to you and the equipment just as is operating a undercharged system. Normally, systems are able to protect themselves from operating under charged. Normally, the reverse is not true. Fortunately, we can only 'force' in so much freon.

You have done what you can at this point. It still doesn't work. It is time to go to a professional. It would appear there is a leak somewhere, a leak that you cannot detect, nor repair. Three cans of freon went some where! Your professional AC service man or woman has the equipment to detect leaks, evacuate the system in an environmentally safe manner, repair the leak, if any, effect any other repair that may be required, inject the proper amount of 'sealer' and AC lubricating oil, change the 'drier' and recharge your system to factory specification. At the end of this service, your AC will be in tip-top condition and probably remain there for years. Best of all, you will not accidently injure yourself or your equiment using this process.

That is my suggestion my friend. I hope you find this information useful. Thank you for your interest in FixYa.com

Jul 18, 2011 | 2001 Ford Expedition

1 Answer

Y mom has a 1996 buick century and she keeps taking it for freeon. The air blows cold for a while the it doesn't . Is there a leak or is the garage missing something. Thanks


it definitely sounds like a freon leak in the system, once a garage checks out the a/c system, they normally put in a dye in the system, and this will show where the leak is, and after the leak is fixed , they will refill the a/c with the proper amount of freon, "you are wasting your money and freon, if they don't fix the leak 1st, before adding freon, hope that this information has helped you.

Jun 20, 2011 | 1996 Buick Century

2 Answers

How many pounds of r134 and how much oil ozs.


somewhere around 1.6 pounds (1lb.14ounces) of R134a if system is evacuated and 3 ounces of oil with new compressor.
keep pressure on the low side around 34-37psi & it should blow snow. Below are normal car AC pressure readings with 134A.
  • Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
  • Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI –
  • Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
DIY recharge kit:
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system.
Thank you for using fixya and be safe.

Jul 19, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

Massage said low ref ac off what dose that mean thanks


that means low refrigerant available and the low pressure switch is preventing the compressor from damaging itself. You will need freon added to the system which in not uncommon since mobile a/c systems normally leak a small amount each year and eventually need topped off to work properly. Either buy some freon from a parts store or find an independant repair shop that will agree to just add the freon necessay to make the system work again. Freon necessary on most systems ranges from 1 to 2 pounds and freon bought in bulk by all shops costs $3 a pound and labor to do this is about a half hour so look at their labor rate and add a reasonable profit for the freon and this is what it should cost. If this helps please reply cause that helps me and good luck

Apr 29, 2010 | 1998 Cadillac DeVille

3 Answers

Accidentally added antifreeze to oil instead of


since it was such a small amount of anti freeze and water,anti freeze has a petrolem base and water would have sunk to the bottom of oil pan, change oil and filter and you should be ok

Mar 02, 2010 | 2005 Dodge Charger

1 Answer

The a/c on my 2006 honda pilot is not owrking and appears to have a low refrigerant charge. I want to recharge it and find the leak with die. what is the amount of 134a to be fully charged


Adding freon or topping off a cars A/C system is the most common task performed to restore performance and get cold air blowing again. However, adding refrigerant isn’t always the solution for car air conditioning problems. There can be many other things wrong besides a system being low on refrigerant. To diagnose problems, an A/C manifold gauge set is needed to read high and low side pressure readings. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.
Keep in mind that using an A/C gauge set and seeing BOTH high and low side readings can help in diagnosing the problem when you know what to look for. First, on a 134A system the high and low side service ports are different sizes. AC gauge sets have color coded hoses, the blue color coded hose has a connection that fits on the low side service port and the red hose has a connection that will only fit onto the high side. The yellow hose won’t hook up to anything if just checking the readings; it can be used to connect to a vacuum pump or attached to a refrigerant can or tank.

*Make sure the condenser fan comes on when the readings are being checked.

Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI
Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI
Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the R143a and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 

Hope this helps. Keep me posted, be glad to help get you cooled again. 

Jul 01, 2009 | 2004 Honda Pilot

1 Answer

Ac compressor took one can of freon will not take other also it still is not cool


You may have over charged the system, An over charged system will also give you poor A/C performance and worst can lead to expensive repair if the compressor get's damaged.
 With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the freon and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 
Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI
Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI
Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

God luck and hope this helps. 

Jun 30, 2009 | 1994 Ford Escort

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