Question about 2005 Mercury Grand Marquis
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Posted on Jan 02, 2017
Unless it's been converted to the newer refrigerant (there would be stickers present indicating a conversion was done) you most likely have R-12. R-12 is only sold to those with a license to repair and service air conditioning.
Posted on Jul 06, 2009
It uses 134. Remember to use the correct type of oil charge if the compressor is noisy. If you are doing it yourself and want to purge the system, you can get a vacuum pump on loan from Autozone or Oreillys. It is a big deposit but you get the money back when you return the machine.
Posted on May 06, 2010
SOURCE: how do i install freon?
Well there are a couple of ways. A full gauge manifold along with a complete understanding of how the AC system works is the best way to do it. The cheaper guessing way is to go down to your local wally world and pick up a couple of cans of R134(assuming they used R134 that year) and the adapter that connects the can to the AC system tubing port(low pressure port, which is usually the fatter tubing)
Some people like to just get the conversion kits even if they are not doing a conversion because it comes with a gauge.
1. Hook your valve with the blue hose to the can. leave the puncture needle screwed out. Then remove the blue cap from the AC system on the car(if the cap is black it may still be R12 If so the blue hose wont even fit on the port)
2. plug the other end of the blue hose onto the port and start the car. Turn the AC on full blast
3. turn the puncture screw on the can end of the hose in all the way and then turn it out all the way.
4. This could take a while and assumes your pump is working to some degree. If the pump is not running it could be due to low pressure. Most systems have a low pressure cutoff to keep from ruining the pump.
1. Without a full set of gauges you really dont know what the system is doing.
2. Warning!!! do not put more then 3 small cans in without verifying your pressures. 3 cans should be enough to bring most empty systems up to working properly.
3. WARNING!!!! If your system is R12 you have 3 choices. A. convert it with a conversion kit. Most mechanics love this because almost nobody does it right and a year or less later the pumps die. B. recharge it for a rediculously high price and must be done by a certified shop. or C. buy a new car because it will be cheaper then getting it recharged with R12.
4. It is usually best to let a shop do the conversion since they will replace the dryer and be able to pump the air out of the system without releasing any Freon into the air (releasing freon into the air is illegal)
I think I covered everything. you might want to use a leak sealer to try and stop the leak. Also you must realize that if your system has any other failures in the pump or restricter that it may not be rechargeable..
Let me know if I forgot anything.
Posted on Jun 22, 2010
You should find a fill stem on the black oblong tank or right next to it. This is the low pressure side. You should get a Vacuum pump which can be loaned from Autozone or Oreillys with a refundable deposit. You need to draw out the moisture in the system and create a Vacuum before you refill it.
You should also use an Oil charge for the compressor. There are Freon cans with the oil charge already in them. However, there are different weights of oil used in the compressor. Let the Auto parts people get you the right type for your car. There are different weights, just like engine oil has different weights.
You will need to jump the connector at the low pressure switch to get the system to take freon. Once you have enough to close the low pressure switch you can remove the jumper wire and fill at will.
Posted on Nov 21, 2010
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