ApplianceMath.ai| Variable | Value |
|---|---|
| Average dishwasher lifespan | 9 – 10 years |
| Average dishwasher MSRP | $799 |
| Average repair cost | $150 – $350 |
| Most expensive repair | Control board: $413 – $663 |
| National average labor rate | $125/hr |
| Source | Angi 2026, NAHB 2020, J.D. Power 2025 |
How Long Should a Dishwasher Last?
The expected lifespan of a dishwasher is 9-10 years — the shortest of any major kitchen appliance. Hard water is the single most damaging environmental factor, accelerating wear on the pump, spray arms, heating element, and door seals simultaneously. High usage frequency and control board vulnerability after year 7 are the other primary lifespan factors. A dishwasher past year 7 facing a control board failure is in genuinely borderline territory.
The Most Common Dishwasher Repairs — And What They Cost
| Repair | Part Cost | Labor (hrs) | Total Estimate | DIY Viable? |
|---|---|---|---|---|
| Door latch | $10 – $50 | 1.0 | $135 – $175 | Yes |
| Door gasket/seal | $15 – $75 | 1.0 | $140 – $200 | Yes |
| Spray arm | $15 – $60 | 1.0 | $140 – $185 | Yes |
| Water inlet valve | $25 – $85 | 1.0 | $150 – $210 | Yes |
| Drain pump | $35 – $115 | 1.5 | $223 – $303 | Moderate |
| Circulation pump/motor | $75 – $200 | 2.0 | $325 – $450 | No |
| Heating element | $20 – $80 | 1.5 | $208 – $268 | Moderate |
| Control board | $100 – $350 | 2.5 | $413 – $663 | No |
Labor calculated at national average $125/hr. Actual cost varies by market.
When Dishwasher Repair Makes Financial Sense
Clear repair scenarios: a 4-year-old dishwasher with a failed door latch ($150 repair on a $799 unit = 19% of replacement cost); a 5-year-old dishwasher with a failed water inlet valve ($175 repair = 22% of replacement cost); a 3-year-old dishwasher with drain pump failure ($260 repair on a $999 unit = 26% of replacement cost).
When Dishwasher Replacement Makes Financial Sense
Clear replace scenarios: a 9-year-old dishwasher with control board failure ($413-$663 repair representing 52-83% of an $799 MSRP at end of expected lifespan); an 8-year-old dishwasher with circulation pump failure where age ratio (8 ÷ 9.5 = 0.84) combined with repair cost pushes the AM Score into replace territory; any dishwasher past year 9 with any major component failure.
The Year 7 Threshold
Control board failures increase significantly after year 7. A control board failure at year 7 produces an AM Score of approximately 60 — genuinely borderline. In high-cost markets like San Francisco it tips into replace. In lower-cost markets it stays in repair with caution. Local labor rates matter significantly on dishwasher decisions near the year 7 threshold.
Brand-Specific Considerations
Bosch: The clear reliability leader. Documented lifespans of 10-12 years. Repair viable through year 9 for non-control board failures. The premium price reflects genuine longevity.
Whirlpool/KitchenAid: Solid reliability with good parts availability. Repair viable through year 8 for most failures.
Samsung: Below-average reliability. Control board and door latch failures documented above average. Past year 6 the replacement threshold arrives faster.
Frigidaire: Lower MSRP means the 50% threshold arrives at a lower dollar amount. A $400 repair on a $599 Frigidaire is 67% of replacement cost — the math moves faster toward replace on budget models.
Key Takeaways
- Average dishwasher lifespan: 9-10 years — shortest of any major kitchen appliance
- Average dishwasher MSRP: $799
- Control board failures increase significantly after year 7
- Clear repair: cost under 25% of MSRP, appliance under 6 years old
- Clear replace: control board or pump failure past year 8, any major repair past year 9
- Bosch is the most reliable dishwasher brand — repair viable through year 9
- Hard water significantly accelerates dishwasher wear
- Sources: Angi 2026, NAHB 2020, J.D. Power 2025