My husband bought a can of r134a to try and fix my air, we have followed directions and it will not attach to the low pressure port? We made sure it was the bigger of the two, near the battery. What are we doing wrong? Can you use r134a with a 1997 buick lesabre?
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You have to insert a can of R134A refrigerant and hose on the low pressure port.
Normally it is the fatter of the two hoses coming from the compre3ssor.It should then kick in with the A/C switch engaged.
If not you may have a bad fuse,switch,compressor,or relay.
To add refrigerant to your A/C system, remove front passenger side tire, remove plastic inner liner of whel well ( I only removed the torx bolt that holds it to the fender and folded it back) There is a silver canister there with a small tube with a black cap, that is the low side where the refrigerant goes. Get the hose attachment wit a gauge so you don't overfill, and a can of r134a, I used duPont Suva, and follow the directions on the hose attachment. Cost around $35USD total and about 45minutes and I now have cool air blowing.
A/C low side ports are located on the 'thicker' plumbing vs. the 'thinner' plumbing coming off of the compressor.
Just follow the low side pipes from the compressor to the first low side port. It should also fit a quick connector onthe hose/can combination for r134a. The high pressure side port will not work with the low side hose quick connector.
Most likely it needs to have the freon recharged. This is very common with R134A systems. You can do this yourself or have a shop do. Doing it yourself requires that you locate the Low pressure line, don't worry, the recharge can adapters will only fit the low pressure side, and to follow the directions on the can and watch the attached gauge. Over charging your AC is very bad and can cause very expensive damage. All the instructions you will need for using the recharge can will be printed on the can. Follow them. If you choose to do the job yourself you can get the recharge can with Hose and Gauge from Walmart, Auto Zone or just about any places you can get Oil, plugs and Oil Filters at.
hmm ..if you are looking for the low side air conditioner port .. then locate the condenser (thats in front of and looks like the radiator) .. you will notice two tubes going to that ..one is large the other small .. the small tube is the high pressure side .. the large tube is the low pressure side ... follow the large tube back until you find a cap that covers the low pressure port .. thats where you would fill with new refregerant (r134a) .. if you buy r134a, you can also get a filler hose and gage.. that hose will only hook up to the low pressure port ..it wont fit the high pressure port ...
the refill bottle shouuld never be attached to the high pressure side (high side) .. the connections are different to prevent that .. if you did manage to hook that up, there would be great danger of the bottle exploding ... so you can only hook the bottle up to the low pressure side (large piple) ... the retrofit kit should have included adapters for both high and low pressure sides ... the correct adaptor should fit the R134a refill bottle hose ... it should also fit the low pressure port (you may have to remove the valve in the old port (read instructions for that) .. if the adapter does not fit then you might check with a dealer or air conditioner supply house for a special adapter ... R134a and R12 are completely incompatable so make sure you have washed out the system and replaced the dryer and sometimes the hoses ... you cant have any of the old lube left in the system .. its generally a good idea to replace all rubber parts for the changeover .. you will need to pull a vacuum for a couple of hours before refilling .. .
probably low on freon R134A. Buy a can with a gauge on it. Addd to the low pressure port in engine compartment on passenger side, low pressure hose. If the compressor starts working, then you are low. Do not overfill or you will damage compressor. The gauge should have a "good" zone on it, stay in the god zone. If it starts cycling very fast, it is still low.
It should cycle 4 to 7 times/minute at 70 degrees F.
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Please rate as fixed if this helps.