Maytag MDB7979SHZ0 dishwasher Parts

Most Maytag dishwashers, including model MDB7979SHZ0, typically last 10 to 12 years with normal household use. Keeping water flowing and draining correctly, and fixing small leaks or rack issues early, is what most often pushes real-world life closer to the high end.

Typical lifespan and what changes it

• Typical range: 10 to 12 years
• With excellent care: up to about 15 years
• Heavy use (multiple loads daily): often shorter due to pump, heater, and seal wear

What to do to help your dishwasher reach 12+ years

• Clean the filter area and remove debris that can strain the wash and drain system.
• Run hot water at the sink before starting a cycle so the dishwasher fills with hotter water sooner.
• Use the right detergent amount; too much can cause buildup, too little can reduce cleaning.
• Inspect for small leaks at the bottom of the door and address them early.
• Keep racks rolling smoothly so you do not stress the rails and rack supports.

Parts that commonly affect “end of life” decisions

When a dishwasher stops draining, leaks, or stops heating, repairs often come down to a few high-wear parts:

Symptom	Common area involved	Example part for MDB7979SHZ0
Not draining	Drain system	Dishwasher drain pump WPW10348269
Not drying well	Heating circuit	Element assembly W10703867
Leaking at door bottom	Door sealing	Dishwasher door seal, lower W10909089

Why it matters

A dishwasher near the 10 to 12 year mark can still be a great candidate for repair if the tub is sound and the issue is isolated (drain pump, inlet valve, door seal). Catching problems early usually prevents secondary damage like corrosion, odor, and repeated clogs.

Last updated: January 2026

For the Maytag MDB7979SHZ0 dishwasher, the most common issues we see are poor cleaning, not draining, and leaks. These problems are often caused by clogs, loading and detergent issues, or a failing drain or fill component such as the pump or inlet valve.

Most common symptoms and what usually causes them

• Not draining: food debris in the sump area, a kinked/blocked drain hose, or a weak dishwasher drain pump WPW10348269.
• Poor cleaning: clogged spray arms, low water temperature, overcrowding, or a wash system restriction.
• Leaking: a worn lower door seal, cabinet seal issues, or a loose hose connection.
• Not filling enough: restricted supply, or a failing dishwasher water inlet valve WPW10327249.
• Not drying well: rinse aid issues, cycle selection, or a heating problem (often tied to the heating element).

Quick checks we recommend before replacing parts

1. Reset power: turn the breaker off for 1 minute, then back on.
2. Confirm the drain path: check for kinks and clogs in the drain hose and disposer/air gap (if used).
3. Clean for flow: remove debris from the bottom of the tub and rinse the filter area.
4. Improve loading: keep tall items from blocking spray arms; avoid nesting bowls.
5. Use the right detergent: fresh detergent, correct amount, and avoid overfilling.

Symptom-to-part guide (common matches)

Symptom	Most likely area	Part to consider (if needed)
Water left in bottom	Drain system	Dishwasher drain pump, drain hose
Dishes gritty or dirty	Wash flow / spray	Circulation path, spray arm blockage
Water on floor at front	Door sealing	Lower door seal, cabinet seal
Slow fill or no fill	Fill system	Dishwasher water inlet valve

Why it matters

Catching a drain, fill, or seal problem early helps prevent repeat cycle failures, standing water odors, and moisture damage around the dishwasher. It also helps you avoid replacing higher-cost assemblies when a hose, seal, or pump is the real cause.

Last updated: January 2026

Yes. On Maytag dishwasher model MDB7979SHZ0, you can usually reset the control by canceling the current cycle and rebooting the control panel. A common method is pressing and holding Start/Resume for about 3 to 5 seconds, then restarting a cycle.

Quick reset options (most common)

• Cancel and drain: Press Cancel/Drain (or Cancel) and let the dishwasher pump out.
• Start/Resume reset: Press and hold Start/Resume for 3 to 5 seconds, then close the door and try a new cycle.
• Power reset: Turn the dishwasher off at the breaker for 1 minute, then restore power.
• Door reset: Open the door, wait 10 seconds, close it firmly, then press Start/Resume.
• Control lock check: If buttons do not respond, disable Control Lock (varies by console).

If it still will not run after a reset

A “reset” helps when the control is stuck, but it will not fix a mechanical issue like a no-drain or no-fill problem. Check these common causes:

• Standing water in the tub (possible drain restriction)
• Kinked or clogged drain hose
• Door not latching fully
• No water entering (shutoff valve closed or inlet issue)
• Error code present on the console

Common symptoms and likely next step

What you see	What it often means	What to check next
Hums but will not drain	Drain path blocked or pump issue	Drain hose, filter area, drain pump
Lights on but no cycle starts	Door not latched or control lock	Latch engagement, lock setting
Fills slowly or not at all	Water supply or inlet valve issue	Shutoff valve, inlet screen

Parts that commonly relate to “won’t start” or “won’t drain” complaints

If troubleshooting points to a failed component, these are common on this model:

• Dishwasher door latch WPW10653840
• Dishwasher drain pump WPW10348269
• Dishwasher water inlet valve WPW10327249

Why it matters

Resetting clears a stuck cycle and restores normal button response, which helps you avoid unnecessary part replacement. If the dishwasher repeatedly needs resets, an error code or a drain/fill problem is usually the real cause.

For code-based troubleshooting, use Maytag microclean he dishwasher error codes.

Last updated: January 2026

Maytag dishwasher model MDB7979SHZ0 is rated at 47 dBA. That sound level is considered very quiet for a built-in dishwasher; you will typically hear a soft wash sound and occasional drain “whoosh,” especially on heavier cycles.

What 47 dBA sounds like in a kitchen

A 47 dBA dishwasher usually blends into normal household background noise, but you may notice it more during fill and drain.

• Soft, steady spray sound during wash
• Briefly louder moments during drain
• More noticeable noise with hard water buildup or heavy loads
• Quieter performance when the unit is level and firmly mounted

Sound level	Typical experience	Common time you notice it
44 to 48 dBA	very quiet	drain and fill moments
49 to 52 dBA	quiet	open floor plans
53+ dBA	clearly audible	heavy wash and drain

If your MDB7979SHZ0 seems louder than 47 dBA

A dishwasher that suddenly sounds louder usually has a restriction, vibration, or a worn moving part.

• Clear debris from the sump and filter area
• Make sure spray arms spin freely and holes are not clogged
• Check for dishes contacting the spray arms
• Verify the drain hose is not kinked and has a proper high loop
• If draining is loud or rough, inspect the dishwasher drain pump WPW10348269

Why it matters

The 47 dBA rating sets the baseline for normal operation; if noise increases, it often points to vibration, a partial clog, or a drain component starting to wear.

Last updated: January 2026