[Uhehner]

I got a response from Icom.  Filter failures are a normal thing and NOT COVERED by any extended warranty. It's strange that my failure was the same as the "Bad batch of filters" that were covered.
That does not explain why my 25 year old Icom M58 still works or my 30 year old spare Icom M55 still works.
I'll pay the repair charge but lower Icom on my list of recommended electronics. Standard Horizon and Furuno are now at the top.
I'll also recommend that Icom go back to their 30 year old filter supplier.
It's a piece of safety gear, like a life raft I expect it to work when I need it.   Capt.  George