Maytag Dishwasher Cycle Not Completing? Causes

Quick Answer: Why Your Maytag Dishwasher Cycle Will Not Finish#

Most likely: a sensor is not giving the control board the signal it needs to move on, so the board keeps running a phase forever. On Maytag MDB dishwashers the board advances on three things — water temperature (the thermistor), water clarity and drainage (the turbidity and flow sensors), and time limits — and the most common stall is a failed thermistor that reports a constant low temperature, so the board heats and waits for a target it will never see reached. A slow-heating element, a fouled turbidity sensor stuck in a rinse loop, or a weak drain pump are the other usual causes.

Likely Causes at a Glance#

Walking Through the Diagnosis#

First tell STUCK apart from just SLOW, because they point different ways. A dishwasher stuck on one phase makes the same sounds for hours and never advances, which points to a sensor the board is waiting on; a cycle that DOES progress but takes three to four hours instead of the usual one and a half to two and a half is completing each phase slowly, which points to slow heating. Cut power at the breaker before any panel work.

The top cause is the thermistor. If it fails reporting a constant low temperature, the board runs the heating element forever waiting for a target that never registers — the tell is a cycle that runs for hours with the interior clearly hot when you open the door, because the element IS heating but the sensor is lying about it. In diagnostic mode, watch the temperature reading during the heating test: a value that never changes, or an extreme one, confirms it. The thermistor sits in the sump under the filter; a healthy one reads roughly fifty thousand ohms at room temperature, and far off that means replace it. A partly failed heating ELEMENT is the slow-heat version: its resistance has crept up from the normal low tens of ohms, so it still heats but weakly, and the cycle drags on for hours before finally advancing — test the element and replace a degraded one.

The other stalls are about draining and clarity. A turbidity sensor fouled with a greasy film keeps telling the board the rinse water is still dirty, so it runs rinse after rinse in a loop — clean the sensor face in the sump with warm soapy water, and if the loop continues, replace it. A weakening drain pump drains most but not all of the water, so the board never gets its empty signal and hangs at a drain-to-rinse or drain-to-dry transition with a little water left in the tub — clean the filters first, then inspect the pump impeller, and replace the pump if it is damaged. Rarely, the control board's own timer circuit loses track and runs a phase indefinitely with no code at all; rule out every sensor before condemning the board.

Repair or Replace? The Short Version#

Rule of thumb: if the repair comes in under about half the price of a comparable new dishwasher and yours is under eight to ten years old, repair it — a thermistor, a turbidity sensor, or a drain pump is an inexpensive, targeted part, and cleaning a fouled sensor is free. Only a failed control board on an older machine leans toward replacement. Our technicians read the Maytag diagnostic and carry the sensors, elements, and pumps — book a repair.

Frequently Asked Questions#

My Maytag dishwasher ran for four hours — is it supposed to be that long?#

No. Normal MDB cycles run from about an hour on Quick Wash to around two and a half hours on the longest programs, so anything past three hours is a stall. The most common reason is a thermistor stuck reporting a low temperature, so the board keeps heating and never advances.

It gets stuck only on the Sanitize cycle — does that mean anything?#

Yes, a lot. Sanitize needs the highest target temperature, so if the shorter cycles finish but Sanitize hangs, the thermistor is likely reading a little low, or the heating element has weakened enough to reach lower targets but not the sanitize temperature. Test both.

It keeps rinsing over and over — what is that?#

A fouled turbidity sensor. When a greasy film coats it, it reads the rinse water as perpetually dirty and the board keeps adding rinses. Clean the sensor face in the sump; if the loop continues, the sensor needs replacing.

Can I cancel and restart on a different cycle?#

Yes. Cancel and Drain will stop the program and empty the tub, and running a non-heated cycle like Quick Wash next is a useful test — if it finishes normally but a heated cycle hangs, the thermistor or heating system is the problem.