Inspect/Test/Replace
To raise pressure, there must be a restriction in the air conditioning system. The restriction divides the system into the high side and the low side. The terms high side and low side refer to the high pressure and low pressure within the system. CAUTION
The flow control can be either an orifice tube or a metering device called an expansion valve. A thermostatic expansion valve controls the amount of refrigerant that is allowed to flow to the evaporator. A temperature sensing bulb on the evaporator inlet controls the expansion valve.
This system uses an expansion valve as it's flow control device.
Some expansion valves are wrapped with insulation. When the sensing bulb is in the evaporator case, it does not need to be wrapped because it stays cold. When an expansion valve is packed in that type of system, it is only to silence the noise that the evaporator makes.
Only EPA-certified technicians can purchase R-12 refrigerant, since proper recovery and recycling techniques are required to prevent damaging the environment. Improper disposal of R-12 refrigerant can result in a fine.
SOURCE: 2000 Buick Park Avenue Service engine soon light
need to take car somewhere to have the code read with a scanner,try parts stores first some will do it for free if not the dealers have them
SOURCE: Orifice Tube - 2002 Buick Century
Some are in the inlet to the evaporator and some could be in the condenser line. You can get a new orifice tube on autozone for $5 - 20
http://www.autozone.com/N,16301861/shopping/partTypeResultSet.htm
SOURCE: Location under dash for fuse block for 1997 Buick
on the passenger side under the dash there is a cover panel. take the screws out and pull it off, carefull the light needs to be removed after you do this. the fuse panel will be close to the left. oh by the way. their are 4 fuse boxes on this model.
SOURCE: Buick Park Avenue Security System
I've got my own one stuck for weeks and this was the only thing that brought it to life again : http://newrockies.ca/vatsbypass
SOURCE: orifice tube location on a 1995 gmc jimmy
it is located in the high pressure AC line at the AC evaporator core inlet. The high pressure line is the smaller of the two AC lines that come from the AC compressor on the engine..
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