Solved! Taco Hot-Link Plus Hot Water Recirculation

PROBLEM: Waiting for hot water to reach the faucet wastes water, time and money. It can also be uncomfortable. Recirculation pumps can deliver hot water instantly, but lines can be difficult to run and some systems needlessly burden hot water heaters.
SOLUTION: Taco's Hot-Link Plus Hot Water Recirculation system uses existing water lines and a smart controller to instantly deliver hot water just when it is needed, without wasting water or energy.

[@TheWilferch]

It also helps those bathroom sink lines that are near an outside wall and tend to freeze in cold weather.....helps prevent the freeze....amazing.

[@danlux4954]

I’m not getting cold water.