Orifice Tubes, Expansion valves & TXV's - Auto A/C Diagnosis & Troubleshooting Help from the world leader in auto A/C information!

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Here's an even closer look at the same orifice tube. As you can see, the screen is completely restricted. The debris is made up of corrosion from the system (because of acid forming when moisture and refrigerants mix), compressor piston ring material and even metal particles. The vehicle's A/C compressor didn't have a chance.

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