"Shaun Eli" wrote in message
oups.com...
Question for the experts: Is it the number of times the door is
opened, as someone stated above? Or the amount of water flow through
the filter?

I have NYC tap water which is pretty good, and my practice has been to
replace the filter every OTHER time it says to (in other words, tell it
that I replaced the filter, don't replace it, then replace it the next
time it says to).


From what I recall on my Whirlpool manual, it's based on door openings.