Bosch Dishwasher Repair

These eight faults account for most of our Bosch calls in the GTA. Here is what each one looks like and what actually fixes it.

Bosch dishwasher not draining

You open the door and find standing water, often with E24 or E25 on the display. Nine times out of ten something is jammed in the drain pump impeller. Broken glass is the classic culprit. A clogged filter or kinked drain hose causes the rest. We pull the sump cover, clear the pump, flush the hose, and replace the pump only if its winding tests open.

Bosch dishwasher not starting

Sometimes the panel is dead. Sometimes the cycle starts and quits after a few seconds. The fix depends on which it is. A dead panel points to power supply, a blown thermal fuse, or a failed control board. A cycle that quits usually means the door latch microswitch or, on AquaStop models, a triggered leak sensor blocking startup. We test each in sequence rather than guessing.

Bosch dishwasher leaking water

Water on the kitchen floor, or an E15 code because the base pan flood switch got wet. The leak itself might come from a worn door gasket, a cracked sump seal, or a split circulation hose. Finding the source is the real job, so we run a dye test rather than replacing seals at random. Once fixed, we dry the base pan and reset the flood switch.

Bosch dishwasher not cleaning properly

Gritty glasses, food redeposited on plates. Check the spray arms first: Toronto’s water scales up the nozzles over a few years, and blocked holes kill wash pressure. A clogged filter, a weak circulation pump, or an underfilling inlet valve produce the same complaint. We measure the fill volume against Bosch’s spec and test pressure at the upper arm before deciding which part is at fault.

Bosch dishwasher not drying dishes

Bosch dries by condensation, no exposed heating element, so wet plastics at the end of a cycle are somewhat normal. Everything else soaked is not. First check the rinse aid, since an empty dispenser is the most common cause. After that it comes down to the flow-through heater, the temperature sensor, or on CrystalDry models the zeolite element. Each can be tested with a meter in a few minutes.

Bosch dishwasher making unusual noise

Grinding during drain means debris in the drain pump, almost always. A rhythmic knock is usually just a spray arm hitting a pot handle, which costs nothing to fix. The one to take seriously is a low drone during the wash phase. That is circulation pump bearings wearing out, and the pump needs replacing before it seizes.

Bosch dishwasher error codes

E15 is water in the base pan. E22, blocked filter. E24 and E25, drain faults. E09, heater circuit. E01, control board. The code narrows things down to a subsystem but rarely names the exact failed part, which is where owners get stuck. We read the full fault memory, run the component tests in service mode, and replace the part that actually failed instead of swapping boards on speculation.

Bosch dishwasher door or latch problems

A door that will not stay shut, or one that slams down when opened, comes down to the latch assembly, the door springs, or the hinge cables. Bosch sells the springs and cables as a kit, and we fit the kit rather than a single spring so both sides stay balanced. A failed latch microswitch also stops cycles from starting even when the door feels closed.