Air conditioner went out. 105 lbs freon on the low side. Blower for air and heat blows fine. Then the charging system stopped. Jumped the alternator and it charges when exturnaly powered from the battery. Led me to think the ECM was the problem. Replaced it and the charging system is not working again after one day. FYI, 4mo old battery. What next?
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Only way to tell if A/C Evaporator Core Orifice tube is plugged is by looking at A/C gauge readings , An if it is plugged you more then likely need a new compressor , they become plugged with metal particles from worn out compressor. Your best bet would be to take your vehicle to a qualified repair shop .
It may still be low on freon. It can hold several cans. High side should be around 250psi and low around 35 or 45psi at idle if system is charged. If you raise engine speed the low can drop below 20psi and switch off the compressor if the system is low on freon. Could be a restriction in the system, bad relay, or bad a/c compressor-clutch.
Wow thats hot!! Ok want a quick fix? You sound like ya have a leak so lets see whats going on....buy 3 cans of freon 123a...they come in 1 pound cans...get a low pressure charge hose.
here"s what you will do,
buy 1 can of leak detector freon 134a(1 Lb.)
1 can of synthetic freon 134a with oil(1Lb.)
1 can of 134a freon with sealer
Find the low fill port the fitting will only fit on low side....there are two one is the high one is the low they both have screw off caps use the bigger one...thread the first can with leak detect. in it and fill it through the port, turn a/c on high blow full a/c, jump out the compressor low pressure cut out switch...if you buy your stuff from Auto Zone the guy will show you which switch that is on a diagram he can supply for free just ask, next fill the leak stop can, then the one with a/c oil.
Should be cold, drive a while or until it leaks out and spot the dye coloration coming out of the system showing you where the leak is, bleed off the system repair the leak and refill like I just told you use up to 2 3/4 cans max.
You may have created an over charged condition and at this point the a/c compressor will cut off on high head pressures. This can be verified by installing gauges to the systems high and low side service taps and reading the pressures.An overcharged system will start the compressor briefly but soon cuts off once pressure goes to 350 - 400 lbs on the high side. Acceptable pressures for this system should be no greater than 250 high and low suction should drop to 40-50 psi.You might recover the charge and evacuate the system,then try bringing the charge back to proper level.A sight glass in the reciever drier really helps determining proper fill.Once all bubbles have dissipated from the sight glass during charging ,one should stop at that point to avoid overfilling.Too much freon is worse than a low charge especially in hot ambient conditions....
simply "adding a can"is a good way to end up with non-functional A/C. the typical system has high/low pressure switches that enable/disable the system. you need to be at the correct volume of refrigerant as specified on the sticker under the hood. i recommend using the proper equipment, evacuating, pulling a vacuum, and then refilling the system with the appropriate amount.
Hello I'm a M.B. tech. 1st you need to know why the freon is low. Hopefully it just needs to be serviced. There is a component located in the lf of the engine compartment called a receiver drier. It soaks up the moisture in the freon so the gases can work the way they are supposed to. On this unit there should be 2 switches(I believe they were combined into one switch in 98. 1 switch is a temp switch that operates your electric fans, the other is a compressor cutoff switch. Assuming the compressor is not coming on-take a fused wire and bridge the 2 contacts- If the compressor does not come on at all there is another problem(it is not low on freon. On the condenserthere is a high side port(it is the bigger of the 2)By the brake master Cyl.(lf of the engine compartment thereshould be a smaller low side valve in line with the fuel cooler hose. Usually you can hook up a machine to the low port and **** freon in through that port. Assuming you do not have a refrigerant machine. It is very self explanatory on the bottle of r 134a refrigerant which can be purchased at your local auto supply store. I would start with 1 lbs. and add dye with the freon in case there is a big leak. If the system is overcharged it will not cool properly. I believe the system capacity is approx. 2 lbs. Add a few ounces after the first pound until a/c system is cooling properly and the electric fans are also coming on when the system gets to high. If you get a can with a good Gage set on it you should see the high side between 150 and 2000 psi(fan coming on at max. press.) also the low side should read about 35. It is about the temp of the evaporator which is i=located in the dash and the blower blows through this component out through the vents. Hopefully I have been helpful.