("LWG" wrote)
[snip]
My A&P tested the old one after he took the $450.00 new part out of the
box and installed it. The old one was fine, it turned out it was the
ground wire in the wing. He said he threw it in a bucket he has of old,
functional heated pitot tubes.


It's like those Capital One credit card commercial - NO! NO! NO! NO! NO!

The answer is always ...."The ground!"

(Doesn't it seem like that's the case sometimes?)


Montblack