Maytag MDB7749SBM3 undercounter dishwasher Parts

Yes, the Maytag MDB7749SBM3 dishwasher includes a limited 10-year warranty, but it is not a full 10 years of parts and labor. You get 1 year of limited warranty (parts and labor), then years 2 through 10 cover certain component parts only (labor not included); see the MDB7749SBM3 owner's manual for the exact terms.

What the 10-year warranty covers (and what it does not)

Here is how the coverage is structured for this Maytag dishwasher:

• Year 1: limited warranty includes parts and labor for defects in materials or workmanship.
• Years 2 to 10: limited warranty covers factory specified parts only for certain components; repair labor is not included.
• Coverage applies when the dishwasher is installed, operated, and maintained as instructed.
• Proof of the original purchase date is required for warranty service.
• Service must be performed by a Maytag-designated service company.

Covered components in years 2 through 10

For the second through tenth years, the limited parts coverage applies to these specific items:

Component	Covered in years 2-10?	Notes
Upper and lower racks	Yes	Excludes cup shelf and silverware basket
Chopper blade	Yes	Parts only
Stainless steel tub and inner door liner	Yes	Non-cosmetic defects that prevent function

Why it matters

Many customers hear “10-year warranty” and expect 10 years of full coverage. Knowing it is 1 year parts and labor plus 9 additional years of limited parts coverage on specific components helps you plan for service costs and decide whether a repair is worth it.

Last updated: February 2026

The most common issues we see with the Maytag MDB7749SBM3 dishwasher are draining problems, poor cleaning, leaks at the door, and no-heat or drying complaints. These symptoms usually trace back to a few serviceable parts and basic maintenance checks outlined in the owner's manual.

Common problems and what they usually point to

• Won’t drain or drains slowly: clogged drain path, kinked hose, or a failing drain pump
• Dishes still dirty: restricted filter, chopper issue, or weak wash circulation
• Leaking at the bottom of the door: worn lower door seal or tub gasket
• Not heating or poor drying: heater circuit issue or heating element failure
• Door won’t latch or cycle won’t start: door latch not engaging consistently

Quick checks we recommend first

1. Cancel the cycle and confirm the unit attempts to drain.
2. Inspect the sink drain/disposal connection for a blockage.
3. Clean the filter area and remove debris from the sump.
4. Check spray arms for clogged holes and free rotation.
5. Look for water tracks at the door corners that indicate a seal problem.

Parts that commonly solve these symptoms (when replacement is needed)

Symptom	Likely part to inspect	Part example for this model
Not draining	Drain pump or drain hose	Dishwasher drain pump WPW10348269, dishwasher drain hose 8269144A
Poor wash	Sump and motor, chopper, filter	Dishwasher sump and motor assembly WPW10780877, dishwasher chopper assembly W10083957V, roper dishwasher filter W10084567
Door leak	Door seal or tub gasket	Dishwasher door seal, lower WPW10497235, dishwasher tub gasket W10864081
No heat/drying	Heater	Heater W10703867
Won’t start/latch issues	Door latch	Dishwasher door latch WPW10653840

Why it matters

Dishwashers like the MDB7749SBM3 rely on correct water flow, proper draining, and a tight door seal. A small restriction (filter, chopper, hose) can cause multiple symptoms, so checking the basics first prevents unnecessary part replacement.

Last updated: March 2026

A Maytag dishwasher like model MDB7749SBM3 is built around water fill, washing, heating, draining, and door systems. The core parts include the water inlet valve, wash pump and motor, heater, drain pump and hose, filtration, racks, and door latch and seals.

Main dishwasher systems and what they do

• Fill system: brings water into the tub (water inlet valve)
• Wash system: circulates water through spray arms (sump and motor, circulation pump)
• Heating and drying: heats wash water and supports drying (heater)
• Drain system: pumps used water out (drain pump, drain hose)
• Door and safety: keeps the door closed and prevents leaks (door latch, gaskets, seals)
• Loading components: hold dishes in place (racks, wheels, rail stops, utensil basket)

Common parts you may replace on MDB7749SBM3

Here are examples of model-matched parts and what they typically affect:

Part	What it impacts	Common symptom
Dishwasher water inlet valve W11175771	Filling	Won’t fill, fills slowly
Heater W10703867	Water heating, drying	Poor drying, cool wash
Dishwasher drain pump WPW10348269	Draining	Water left in bottom
Dishwasher door latch WPW10653840	Starting and safety	Won’t start, door won’t latch
Dishwasher drain hose 8269144A	Draining	Leaks, siphoning, poor drain

How to identify which part you need

• Match the symptom (won’t fill, won’t drain, leaks, poor cleaning) to the system above.
• Check for simple causes first: clogged filter area, kinked drain hose, overloading racks.
• Use the wiring diagram and component locations in the MDB7749SBM3 owner’s manual to confirm what you’re testing.
• For installation-related issues (leaks at the drain connection, leveling, door rubbing), follow the MDB7749SBM3 installation guide.

Why it matters

Dishwashers are system-driven: a “not cleaning” complaint can be wash circulation, filtration, or heating, while a “not draining” complaint is usually the drain pump, drain hose routing, or a blockage. Identifying the system first prevents buying the wrong part.

Last updated: February 2026