Midea dishwasher (built-in and countertop): field service manual

Covers: Midea-built dishwashers sold in the US under Midea and Comfee badges: 24 in built-ins and countertop units. Codes apply to models with a digital display; non-display models flash indicator lamps instead.

Single sourceBrands: Midea, Comfee4 components

Midea dishwashers are simple value units: inlet valve, a tub float for level, a base-pan float for flood protection, a wash pump, a drain pump, a heater with an NTC sensor and, on better models, a turbidity sensor. Countertop units connect to the kitchen faucet with an adapter, so fill problems often start at the faucet. Display-to-board communication faults (Ed) usually come from the harness flexing through the door hinge.

Safety first

Kill power before removing the toe kick on built-ins.
Turn off water before servicing the inlet valve.

How it works

Fill: the inlet valve opens until the level float is satisfied; if this takes too long the control sets E1.

Wash: the wash pump circulates water to the spray arms; a heater brings water to temperature, read by a thermistor; failure to reach temperature sets E3.

Flood protection: water in the base pan lifts a float; the control sets E4, stops filling and drains.

Drain: the drain pump empties the tub through the filter; built-ins need a high loop or air gap and an open disposer knockout.

Display: the door-mounted display talks to the main board over a harness; a broken link shows Ed.

Components & tests

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Large stainless refrigerator set flush between kitchen cabinets by Alex Qian, Pexels License

Diagnostic guides for this appliance

Component test · Dishwasher

How to test a dishwasher heating element

Many US dishwashers have a hidden or visible loop element under the tub. A good one reads in the tens of ohms. A leak to the tub trips the GFCI even when the resistance looks fine, so always check to ground.

5 steps ~20 mineasy

Component test · Dishwasher

How to test a dishwasher circulation (wash) pump motor

The wash motor pushes water to the spray arms. Older units use an AC induction motor; many newer ones use a brushless DC motor driven by the board. Rule out a jam and a filter clog before testing, and use the tech sheet for winding values.

6 steps ~45 minmoderate

Component test · Dishwasher

How to test a float switch (dishwasher overfill and similar)

A float rides up with water and opens or closes a small switch under the tub. It stops overfill or flags a leak. Make sure the float moves freely before blaming the switch.

6 steps ~20 mineasy

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