Peter R. wrote :
With those cross checks, I came to the conclusion that the pitot heat
itself
must have failed and therefore ignored the ASI. This was confirmed
after I
landed by the touch test.

A good way to troubleshoot pitot heat is to watch the ammeter when
you switch it on. Most pitot heat systems have a hefty current draw,
which is readily apparent when you turn it on. No movement on the
ammeter generally equates to no heat.

I also use the ammeter to check my landing light whenever I turn it
on (it's out in front where I can't see it).

John Galban=====N4BQ (PA28-180)


--
JGalban
Posted at www.flight.org