Installation guide
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How many cubic feet is a Maytag Neptune dryer?
Maytag Neptune dryers are typically in the full-size class at about 6.0 cubic feet. If you are asking about your Maytag MDG4000BWW, that model is not a Neptune-series dryer; use the specs and dimensions in the MDG4000BWW installation guide to confirm the exact capacity for your specific dryer.
Neptune is a product line name, but capacity is mainly tied to whether the dryer is full-size or compact.
- Most full-size Maytag dryers (including many Neptune models) run around 6.0 cu. ft.
- Compact dryers are usually around 3.4 to 4.0 cu. ft.
- If your dryer handles comforters and large towel loads easily, it is almost always full-size
| Dryer category | Typical capacity | What it means for loads |
|---|---|---|
| Full-size Maytag (many Neptune models) | ~6.0 cu. ft. | Bedding, towels, mixed loads |
| Compact dryer | ~3.4 to 4.0 cu. ft. | Smaller loads, tight spaces |
We recommend using the model tag and installation documentation so you match the correct configuration.
- Verify the full model number on the dryer label: MDG4000BWW
- In the MDG4000BWW installation guide, check sections labeled Specifications, Dimensions, or Features
- If you are comparing dryers, use the table above to estimate load size while you confirm the exact spec
Drum capacity affects how much laundry you can dry efficiently. Overloading restricts airflow, increases dry time, and can make a full-size dryer perform like a smaller-capacity unit.
If normal loads take too long, fix airflow first.
- Clean the lint screen every load
- Check the vent duct for kinks, crushing, or lint buildup
- Replace a damaged or warped lint screen with the dryer lint filter WP33001808
Last updated: February 2026
What's the life expectancy of a Maytag dryer?
A Maytag dryer typically lasts 13 years with normal household use and basic maintenance. For your Maytag MDG4000BWW, keeping airflow strong (clean lint system and venting) and fixing small issues early helps you reach that expected lifespan.
Most residential dryers fall into a similar range; usage and ventilation make the biggest difference.
| Dryer use pattern | Typical lifespan | What shortens it fastest |
|---|---|---|
| Light (1 to 3 loads/week) | 14 to 16 years | Long, restricted venting |
| Average (4 to 7 loads/week) | 12 to 14 years | Overloading, poor airflow |
| Heavy (8+ loads/week) | 9 to 12 years | Heat stress, worn drum support parts |
These steps reduce heat stress on the motor, drum support, and gas burner system.
- Clean the lint screen every load; replace a damaged filter such as the dryer lint filter WP33001808.
- Check and clean the vent path regularly (dryer outlet to exterior hood).
- Avoid overloading; heavy loads strain the drum bearings and blower.
- Listen for squealing or rumbling; address drum support wear early.
- Keep the dryer level to reduce vibration and uneven drum wear.
Some symptoms are simple maintenance; others point to common wear parts.
- Long dry times: usually restricted venting or a weak airflow component.
- No heat or intermittent heat (gas models): often ignition or gas valve component issues (for example, gas igniter 4391996 or gas sensor WP338906).
- Loud thumping or scraping: drum support or seal wear (for example, dryer drum bearing kit 306508 or dryer drum rear seal WP33001807).
- Burning smell: lint buildup or airflow restriction; stop using until cleaned.
A dryer that runs hot because of poor airflow wears out faster and can damage major components like the motor, blower wheel, and (on gas models) the ignition system. Your installation guide includes key installation and safety requirements that support proper operation.
Last updated: February 2026
Why is my Maytag Bravos XL dryer not drying?
If your Maytag dryer model MDG4000BWW runs but clothes stay damp, the most common causes are restricted exhaust airflow, poor make-up air in the laundry area, or a gas-heat ignition problem (igniter, radiant sensor, or gas valve coils). Start with venting and airflow checks first.
- Clean the lint screen and confirm it is not coated with fabric softener residue.
- Check the vent hood outside; make sure the flap opens strongly while the dryer runs.
- Inspect the entire exhaust duct for kinks, crushing, lint buildup, or long runs.
- Make sure the room has adequate make-up air and the dryer area is not blocking combustion or ventilation airflow (important for gas models).
- Verify the dryer is installed with proper clearances and the exhaust route matches the factory rear-exhaust setup unless an accessory exhaust kit was used.
For installation and venting requirements specific to this model, use the installation guide.
When airflow is good but there is still no heat (or heat starts then stops), these parts are frequent culprits on gas dryers:
- Gas igniter: can glow weakly or fail to ignite gas.
- Radiant (flame) sensor: can fail to detect heat and stop the gas valve from opening.
- Gas valve coils: can work when cold, then fail as they warm up.
Parts on this model page that match those symptoms:
| What you notice | Most likely cause | What to do next |
|---|---|---|
| Dryer takes much longer than normal | Vent restriction or crushed duct | Shorten/straighten duct; clean venting |
| Clothes dry unevenly, loads feel hot | Poor airflow or overloaded drum | Reduce load size; confirm strong exhaust |
| No heat at all, drum tumbles | Ignition system issue | Check igniter/sensor/coils |
| Heat starts then quits mid-cycle | Gas valve coils failing hot | Replace coil kit |
A dryer depends on steady airflow to carry moisture out. On gas models, the burner also needs adequate combustion air; blocked ventilation or poor make-up air can reduce heat and drying performance, even when the dryer seems to run normally.
Last updated: February 2026
