A modern Whirlpool dishwasher typically runs daily and faces mineral buildup and pump wear over time. Failures often center on circulation pumps, drain pumps, or heating elements that impact cleaning and drying performance.
Repairs are usually economical when a single pump or valve fails and the tub remains leak-free. Replacement becomes more practical if leaks develop, if multiple electronic faults occur, or if performance declines after repeated service.
Since dishwashers are relatively affordable compared to built-in refrigeration, repair decisions should strongly consider age. Units past 7-8 years with recurring mechanical issues often justify replacement, especially if water efficiency and noise improvements are desirable.
However, early-life pump or valve repairs generally fall well below the 40% threshold and extend useful service life meaningfully.