On Sep 7, 8:36 am, "Pete C." wrote:
Fill cleaner with water, hold a piece of aluminum foil in the water and
turn the cleaner on for a second. Take the foil out and hold up to light
looking for holes in it. If there aren't any holes, try exposing the
foil a few seconds longer. If still no holes, you have a problem. The
cheap HF unit put plenty of holes in the foil in just 1 second, and just
about shredded it in 5 or 6 seconds.

Pete C.,

Many thanks! One of the LR units is good, and the other bad. I'm
much obliged!

Dave