These totally enclosed plastic timers are pretty reliable. If you suspect it is bad, you can try spraying a non-residue cleaning spray into the opening by the connector while turning the timer knob. This spray is available at Lowes.

Thanks Guys.......

Supposedly the timer will stop and not advance in different places from time to time.

So, not relying on someone else’s input I begin to check operation. I ended up testing everything and all checked OK to the best of my knowledge.

The timer is the one part I wasn't sure about testing properly. It seems to turn a little stiff, but runs through full cycle with no problems.

Any Ideas.....on Intermittent operation.
(Unfortunately no one can tell me which part of the cycle it tends to stop)

"RICHAPPY" are you referring to QD contact cleaner.........

Thanks again guys.....