Great service like this is rare these days
Very helpful and responsive customer service. Searching the Younits site came up with a substitute updated circuit board for a discontinued part I could not find elsewhere. I contacted the Younits rep because no information about this particular substitution showed up anywhere else in a web search, but when contacted the Younits rep confirmed the accuracy of the replacement, and also that their return policy would allow return of the board if it were not the right match (many suppliers refuse all returns of electronic components by policy). Wrap-up: the exact right part arrived on schedule, the unit is repaired, the customer is happy and so are we.