Two brands, one question I get almost every week: which dishwasher is cheaper to live with? From where I stand at Bay Area Appliance Repair Service, Bosch wins on repair cost. More of its parts come off and swap one at a time, so a failure usually means one part, not a whole assembly. KitchenAid cleans hard and lasts, but the day it breaks you tend to pay more. Here is the detail behind that, and what to keep an eye on whichever one sits in your kitchen.
Two different design bets
Bosch dries with condensation and a stainless tub, no exposed heating element in the floor. Water leaves through a fine filter you are meant to rinse. KitchenAid heats the tub to dry on most models and runs a more aggressive wash, which gets dishes cleaner but leans harder on the pump.
Neither bet is wrong. Bosch trades a little wash muscle for efficiency and fewer parts under stress. KitchenAid trades efficiency for scrubbing power.
What I actually pull and replace
On Bosch, the drain pump is the headliner. That fine filter catches food, but skip cleaning it for a couple months and debris packs in, the pump strains, and the impeller or motor gives out. The parts are cheap and easy to get. Older front-panel models can lose the control board to moisture working its way into the door cavity, and the door latch wears because it is under constant load. A latch that will not seat clean trips the leak sensor and shuts the cycle down mid-wash.
On KitchenAid, the control board is the recurring headache. It is a complex board and it does not tolerate power surges. Put a surge protector on the circuit. When that board dies the bill jumps. Worse, the wash pump and motor are usually one assembly, so a dead motor means replacing the pair. On Bosch that motor often comes off on its own. Gaskets crack on both brands, and I see it more on KitchenAid.
How I run the diagnosis
Bosch that will not drain or quits partway: the filter comes out first. Thirty seconds, and it clears roughly a third of these calls. Then the drain hose and the disposal connection, then a meter on the pump. A KitchenAid acting erratic, random stops, dead buttons, codes that do not match a physical fault, points at the board. But I confirm power and check the ribbon connector before condemning it. A loose ribbon looks exactly like a dead board and costs nothing to reseat.
Leaks on either brand almost always start at the door gasket or latch, not anything internal.
What is safe to do yourself
Clean the filter and spray arms. Wipe and reseat the gasket. Check the drain hose for a kink at the disposal. A door gasket swap is doable on both if you are patient and the part is inexpensive.
Stop there. Drain pump, wash motor, control board, inlet valve: those want a meter and someone who has seen the failure before. On KitchenAid especially, guessing at a board and buying the wrong part is a costly miss.
If you are shopping, not fixing
Buying on repair cost alone, Bosch is the pick. Cheaper parts, more of them serviceable one at a time, predictable failures, and good nationwide stock for a fast turnaround. KitchenAid is a genuinely good machine that cleans better, but expect to pay more the day it breaks, especially on the pump or board. Already own a KitchenAid that runs well? Keep the gasket clean and put a surge protector on it.
When to call us
Call when it will not drain after you have cleaned the filter and cleared the hose, when a code will not clear, or when it still leaks at the door after you reseat the gasket. And call before you buy a control board, because we can confirm the board is the actual fault first.
We work on Bosch and KitchenAid across the Bay Area, along with every other major dishwasher brand. Our diagnostic is $75, credited to the repair, and once we have found the fault you get a straight repair-or-replace call and a price. Schedule a visit and we will tell you whether it is worth fixing before you spend a dime.