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.

Find this part on Amazon →

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

As an Amazon Associate we earn from qualifying purchases.

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 →

Frequently asked questions

What does the E02 code mean on a Bosch dishwasher?

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

What causes the E02 code on a Bosch dishwasher?

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.

Is it safe to keep using a Bosch dishwasher with a E02 error?

Limited use only. This is rated a serious-severity fault.

How do I fix E02 on a Bosch dishwasher?

Power off at the breaker before any electrical test. Pull the dishwasher and remove the lower kickplate to access the heat pump/heater. Ohm the heater across its terminals (typical 20-40 ohms for Bosch flow-through).

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.