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Teflon tape on ac fittings, good or bad idea. 200 1990

posted by  Steve on  Fri Jun 24 13:13 CST 2005
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last visit: Fri Oct 24 07:16 CST 2014
[RELATED]

Many leaks occur at o-rings or fittings, so your ac friend is correct. I had just this situation and ended up replacing the entire pipe with the old fitting. Don't use Teflon tape. Refrigerant causes Teflon to soften and fray and little pieces will break off to clog the expansion device. The teflon tape will also buffer threaded connections to cause bridging [a gap]on a o-ring fastener and other types of compression seals.






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