How often should you replace a dishwasher?
Updated July 2026
Plan to replace a dishwasher every 9 to 12 years, and pull the trigger sooner the moment an aging one leaks, loses its pump, or shows a rusted-through tub. A dishwasher rarely fails safely: a slow weep from a tired door seal or split hose can rot the cabinet and subfloor underneath long before you notice a puddle. Past the 8-year mark, a repair costing more than about half the price of a new machine is money thrown at a unit already near the end of its run.
What changes the interval
| Your situation | Interval | Why |
|---|---|---|
| Under 6 years old | Repair it | Well within the expected life, and parts are easy to find |
| 7–9 years, minor fault | Repair it | Worth fixing while the tub and pump are still sound |
| 10+ years, major fault | Replace it | A pump or control board on an old unit rarely pays off |
| Leaking from the tub or door base | Replace it | Water reaching the cabinet and floor is the costly failure |
| Rust flakes appearing in the tub | Replace it | A rusted-through stainless or coated tub cannot be repaired |
| Only the racks are rusting | Repair the racks | Replacement rack tines and clips cost $15–40 |
The cost of skipping it
What running it to failure costs: the danger is not a dramatic breakdown but a quiet leak. A perished door gasket or cracked supply line can seep for weeks, swelling the cabinet base, delaminating the flooring, and seeding mold that an $450–1,000 new machine would have prevented. By the time the smell reaches you, cabinet and remediation work can run $2,000–8,000. Replacing a unit that already leaks, rather than chasing a $250–400 repair on a decade-old machine, is usually the cheaper and drier call.
How to do it (Half a day · pro install $150–300, or DIY swap)
- Check the age on the serial-number date sticker inside the door frame or on the tub edge.
- Weigh the repair quote against half the price of a comparable new unit; over half on a 9+-year machine means replace.
- Measure the opening, since a standard dishwasher is 24 inches wide and drops into the existing cabinet gap.
- Shut the water at the supply valve under the sink and the breaker before disconnecting anything.
- Have the installer haul the old unit and inspect the subfloor beneath it for existing water damage.
Knowing the interval is the easy half. OnOtto reminds you at the right interval, and it won't let you snooze it into next year. Tasks persist until they're done, and completing dishwasher replacements schedules the next one automatically.
Put this on autopilot, free for 30 daysFrequently asked questions
What usually kills a dishwasher first?
Water-driven failures lead the list. The drain or circulation pump seizes, the door gasket hardens and leaks, the control board fails after years of heat and steam, or the tub and its seams corrode until they seep. Diverter and spray-arm problems are cheaper and worth fixing on a newer unit. What tips a machine into replace-it territory is a leak reaching the cabinet, or an expensive part failing on a body that is already 10 or more years old.
Is it worth repairing a dishwasher over 10 years old?
Usually only if the fix is cheap and the tub is sound. A common rule of thumb: if the repair costs more than half of a new comparable machine, replace instead. A $200 door-latch or valve swap on a 10-year unit can be reasonable, but a pump or control board approaching $350 to $450 rarely is. Weigh it against the machine's expected 9 to 12 year lifespan, and remember a new one also cleans better and uses less water.
Do pricier dishwashers actually last longer?
Not as much as maintenance and water quality do. A premium stainless-tub unit resists rust and runs quieter, but the pump and electronics inside a mid-range model often come from the same parts bins. Hard water, skipped filter cleanings, and overloading age any machine faster than the badge on the door. Clean the filter monthly and descale regularly and a $600 dishwasher can easily outlive a neglected $1,500 one.
How do I get a dishwasher to last closer to 12 years?
Give it the three things that wear it out the least. Rinse the filter monthly so the pump is not straining against packed food. Descale on a schedule if you have hard water, which keeps scale off the heating element and jets. And do not overload or force the racks, which cracks the tines and stresses the door hinges. Softened water helps most of all, since limescale is what shortens the heating element and clouds the glassware.