Bosch · Dishwasher Serious

E02 — Heating element / NTC sensor fault

Per Bosch's official US error-code page, E02 is a main control board relay fault/error.

Keep using it?
Limited use only
DIY difficulty
Moderate
Typical cost
$60-140
Verified against
bosch-home.com ↗

The fix

Heating element (flow-through)

Heating element / NTC temperature sensor fault

$60-140 hard difficulty 90 min Tools: screwdriver, nut driver, pliers, multimeter

Diagnose first: Water not heating to target temperature in expected time; usually open heating element.

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Didn't resolve it? Next suspect: NTC temperature sensor ($20-45)

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How to fix it

  1. Power off at the breaker before any electrical test.
  2. Pull the dishwasher and remove the lower kickplate to access the heat pump/heater.
  3. Ohm the heater across its terminals (typical 20-40 ohms for Bosch flow-through).
  4. Ohm the NTC sensor at room temp (~50k ohms typical) and verify resistance drops with heat.
  5. Inspect heater connector for burnt pins; replace harness if scorched.
  6. Replace the flow-through heater assembly if the element is open or shorted.

Why it happens

Typical signs: Dishes come out cold and wet · Cycle stops part way · Long cycle time · No drying action

  • Failed flow-through heater Open element in the Bosch flow-through heater (no resistance across terminals).
  • NTC temperature sensor failure Sensor reads short or open, board cannot trust temperature.
  • Wiring to heater open Burned terminal or rodent damage on heater leads.
  • Control board relay failed Heater relay on the PCB stuck open.

More Bosch dishwasher codes

E01 E01 — Control board fault E03 E03 — Water not heating E04 E04 — Water flow / flow meter fault E05 E05 — Overfill / float switch tripped E06 E06 — Door-Closure or Aqua (Turbidity) Sensor Fault E07 E07 — Drying fan fault

All Bosch codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: bosch-home.com.