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Re: replace expansion valve
The only expansion valve that I can think of that you may like to replace is on the air conditioning unit....This valve is found usualy mounted onto the AC unit....You'll have to remove the dash board and centre consul....This is qute a job....You should then see the expantion valve on the cabin side of the AC housing....where the pipes go thru into the engine compartment....NOW HOLD EVERYTHING.....before you can remove the valve you need to depressurize the AC unit....That should be done by an expert....The gas is dangerous and you must wear safety googles at ALL times....Once you have removed the valve, you must seal the system so that as little moisture as possible enters the system....If it is left open, you'll have to replace the dryer unit too....when you've finished your replacement, assembly is the opposite as disassembly.....You'll then need to have the system recharged....Don't try to engage it until that has been done....It wont work even if you tried ,as there are pressur switches which will inhibit the opperation....If you have had practice, it will take about three quarters of a day......if not, three or four days
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It looks like the blower unit needs to come out, you need a recycling machine
and a very accurate evacuation and charging setup to make sure the amount of
R134 is correct, as well as the correct oil type and amount that will need to be
added to the system once the part is replaced.
Even a couple of ounces
off can make the car not cool correctly
YOU HAVE TO HAVE THE AIR CONDITIONER SYSTEM DISCHARGED AT THE DEALERSHIP. OR AIR CONDITIONER REPAIR SHOP.YOU ALSO HAVE TO DISABLE YOUR AIR BAGS.YOU HAVE TO REMOVE THE EVAPORATOR HOUSING TO GET TO THE EXPANSION VALVE.YOU HAVE TO REMOVE THE GLOVE BOX AND GLOVE BOX FRAME.TO GET OUT THE EVAPORATOR HOUSING.REMOVE EVAPORATOR CORE FROM HOUSING TO REMOVE EXPANSION VALVE.THIS JOB IS REALLY A DEALERSHIP JOB.YOUR AC SYSTEM HAS TO BE EVACUATED CHARGED AND LEAK TEST.BEFORE YOUR AC SYSTEM WORK PROPERLY.
Check for ac low pressure switch gone bad.If the expansion valve goes bad it will cause that problem,also, make sure there is enough freon in system.If you could get some one to put ac gauges on the vehicle you could tell a lot about the system,It would tell if the low side was too low(bad expansion valve)or if it was too high on the low side or high side (bas expansion valve or block dryer or condenser.
Expansion valve is located passenger dash area , inside the evaporator housing. This is not a repair that can be easily done by a home "do it yourselfer".It requires evacuating the the air condition system of freon is the biggest obsticle doing at home. Rec. taking to a certified a/c repair shop for this repair.