This is on a 2000 Caravan. I was wondering if anyone new why I needed to replace the expansion valve when replacing A/C compressor to make the warranty good? Is it really needed or is this just a way for the parts store to make another $60. 3 years ago I replaced the compressor with a remanufactured one and now the clutch on it is going out. I never replaced the expansion valve because I couldn't get to it very easily. I'm thinking about just throwing on another compressor. Only plan on keeping the van another year or two.

the accumulator or expansion valve on some they are called. control flow and have a filter in there which clogs from debris from compressor.thats why compressor company wants it replaced.

when old compressor is runing in its last hour or minutes.what is happening is while buring out little metal picies are coming apart and traveling with freon,this is before ac dies completely. these small picies get trap in the expansion valve and the accumulater.and will set up a blockage when you install new compressor this will cause the new compressor to fail prematurely.you want to make sure to change these parts and also change the 5.00 inline filter.

THERMAL EXPANSION VALVE
Another common refrigerant regulator is the thermal expansion valve, or TXV. Commonly used on import and aftermarket systems. This type of valve can sense both temperature and pressure, and is very efficient at regulating refrigerant flow to the evaporator. Several variations of this valve are commonly found. Another example of a thermal expansion valve is Chrysler's "H block" type. This type of valve is usually located at the firewall, between the evaporator inlet and outlet tubes and the liquid and suction lines. These types of valves, although efficient, have some disadvantages over orifice tube systems. Like orifice tubes these valves can become clogged with debris, but also have small moving parts that may stick and malfunction due to corrosion.

Not only do you need to replace it, you need to thoroughly flush the system of debris and old oil so you don't have to do it over again next week. I also install a filter in the inlet side of the compressor for extra protection. Most new compressor failures are not due to poor manufacturing, most are due to improper installation. If there is no internal compressor failure you might get away with just replacing it, but don't expect to get a warranty on it if you don't buy and install the dryer and expansion valve. As far as getting to the expansion valve, it is pretty easy if you remove the wiper module.

It sounds more like prefessional work to me if I want it to last. Thanks for the info. Maybe I'll just get the parts and pay a pro for the labor.