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You really need the vacuum machine that is used to suck out all the old stuff and moisture etc. to do it right.

Reclaim refrigerant. Be sure system is empty. Unhook refrigerant lines from condensor, and evap core. Best to use a "flush gun" and compressed air. Brake clean is a good solvent to use, as it evaporates quickly, and leaves no residue. Flush, and back flush. Use a clean container to capture the solvent as it comes out. Inspect to see if metal flakes are present. Usually one or two flushes in each direction will get all of the grayish, metal flakes out. Usually their is very little, if any in the evap core. On some Fords where compressor failure is catastrohic, and large amounts of metal are deposited in condensor--then maybe necessary to replace condensor. Especially on Rangers, and Explorers.

After flush complete. Then be sure and blow compressed air through the evap, and condensor core to remove residual solvent. Be sure and install the correct type, and amount of refrigerent oil in compressor and accumulator. Some techs will put a little oil in the evap & condensor too. My experience has shown that is not necessary. After system is evacutated and charged, check hi-side pressure with manifold gauge assbly to make sure their are no "pressure spikes", this could indicated a faulty condensor core.

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15y ago

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