Product review (4 stars): All-in-all a proper fix...
Worked after I swapped my old switch/display panel with the new on ( this is why a 4 star rather than 5 ).  The new one has the "188" time display standing too high from the base surface ( about 1/4" taller than the old unit ) and would not fit the space available in the door cavity.  But after I figured out the problem and simply unsnapping each switch/display units and fixing the problem all went well.  I then opened the old unit to expose the circuit board.  The problem was obvious... a failed mini 6V heater relay.  It had overheated and melted the solder and the electrical contact was lost.  So I then purchased an alternate relay and will install it in the old circuit board in order to have a spare replacement.  All-in-all a proper fix and far less $ than hiring a repair person to do the same thing but without a spare circuit board (there are good YouTube videos on this subject).