Bosch Dishwasher E:02: Washing Continues Without Heat

What E:02 means

Cold water, damp dishes, and E:02 on the display: the dishwasher is still working through its program, but nothing is warming the water. Bosch sets this code when the heater side still responds yet the control no longer trusts it, so the machine presses on cold rather than power the heater. The chart names four suspects: a relay welded shut or burned out, current escaping from either of two heaters, or the relay of the zeolite drying unit.

Common causes of E:02

Main heater relay welded shut or burned out
Current escaping from the heat pump heater to ground
Current escaping to ground, or a dead relay, in the zeolite drying unit (only on models that have one)

✓ One safe check you can try

No owner test exists for E:02. Leaking current can only be confirmed with an insulation tester on a machine cut off from power. 1. Switch the breaker off. 2. Keep wet hands away from the tub and the door frame until we have looked. 3. Skip further cycles and call us.

! Why to stop there

Stray current can reach the tub walls, and you would be standing in front of them with damp hands or bare feet on a kitchen floor.
Two of the possible repairs mean swapping a sealed drying unit, which nobody can open up and mend at home.
The four suspects live in two different places, and only model-specific resistance specs tell them apart.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dishwasher codes

E:01Bosch Dishwasher E:01: Cycle Ended Early, Heater Relay or Pump Unconfirmed E:30Bosch Dishwasher E:30, Voltage Too High and the Machine Shut Down E:31Water in the Zeolite Container - Bosch Dishwasher E:31 FBosch Dishwasher F on an Older Display (Water Filling) 2HBosch Dishwasher 2H: Long Cycle Warning on Older Displays 1Bosch Dishwasher Service Test Result 1: Aqua Sensor 2Bosch Dishwasher Service Test Result 2: Heating Group 4Bosch Dishwasher Service Test Result 4: Water Filling

E:02E:02 questions

What is the zeolite unit this code mentions?

A drying unit filled with mineral beads, found on some Bosch models, that adds heat near the end of a cycle. It has a dedicated heater and relay, and trouble in either shows up as this code.

Can I run it cold and finish drying by hand?

We advise against it. Since a ground fault is one possible cause, continued use is a safety question, not a convenience one. Please wait for a diagnosis.

Do I get a price before you repair it?

Yes. Once we diagnose the cause, you get a written price, and we start only after you approve. The work is backed by a 30-day workmanship warranty.