Hi @petey94503
Here's the [https://f01.justanswer.com/woody463/d3683495-dac2-4491-a155-2e7d25bc60af_mdb4949sde3_TechSheet-W10867183-RevB.pdf|tech sheet] for the dishwasher.
Run the ''service diagnostic cycle'' as shown on p.6 and check if any error codes are being displayed.
The error code meaning and the possible causes are shown on p.7→p.12.
If there's a faulty part, here's a part supplier's [https://www.partselect.com/Models/MDB4949SDM3/#Sections|parts list] for the dishwasher that may be useful.
Search online for the ''manufacturer's part number'' of the required part (not the part supplier's part number) to find suppliers that suit you best.