Spent an hour or so trying to find the leak on a freezer which takes 404a. I
beeped every fitting, and then up and down the evaporator and condensor. No
indications at all, of a leak.
Today just for something to do, I tried the beeper (D-Tek, Tek Mate) on a
jug of 404a. Loosen the cap, give a twist on the valve, and I can hear the
gas hissing out. The beeper doesn't even whimper. Same on a jug of R-22 and
the beeper reacts instantly. Back to my catalog, it says the Tek Mate
detects CFC, HCFC, HFC, and blends.
What's going on? What to do about it?
Christopher A. Young
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