Dishwasher drains very slowly (Shoreview)

Here's the situation: bought a new dishwasher 4 years ago (I think). Lately it has failed to drain the wash compartment after a wash cycle -- there's always about an inch of water in there. If I push the "drain" button a few times, it empties out a little at a time. So it's not clogged -- it just drains slowly. I have checked the drain hose (I can blow air through it into the disposal fine). I tried plunging the drain in the compartment, too. Nothing came out.

Here's another clue: the inside is covered in limescale. I have had trouble with my softener in the past (salt bridge preventing the beads from recharging). I ran two cycles with CLR per the instructions. It still has the drain problem, the limescale is still there, and now there is rust on the rails for the wash rack.

!!




Location: Minnesota -
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