Bosch Dishwasher E01, E02, E04 Error: Power Module Board (#12009511)
Quick Answer: The E01, E02, E03, or E04 error code on a Bosch dishwasher indicates a failed heater relay on the main Power Control Module Board (#12009511 / #00705088) located at the bottom-right rear of the machine, or a short circuit in the Heat Pump (#12008381).
⚠️ Why Your Dishes Are Cold on Bosch E02 / E04: Unlike E09 (where the heating coil inside the pump burns out), E01/E02/E04 means the small 12V solder relay on the white plastic Power Module Box (#12009511) has burned its contacts!
#1 Most Common Fix: Bosch OEM Programmed Power Control Module
Official OEM Part Number: #12009511
⏱️ Install Time: 20 Minutes (Right side base access) | 💰 Avg Cost: $118.00 – $155.00
Step 1: Free 2-Minute Reset & Test
- Unplug the Bosch dishwasher from the wall outlet (or flip the breaker) for 10 full minutes to reset the power module relays.
- Pull the dishwasher out, remove the right side panel, and unplug the white plastic Power Module box (#12009511) next to the power cord.
- Open the plastic casing and inspect the circuit board for a black scorch mark under the square white heater relay.
Step 2: Symptom & Part Number Lookup Table
| Symptom | Required OEM Part | Difficulty & Cost | Action |
|---|---|---|---|
| Dishwasher finishes cycle with cold water and displays E01, E02, E03, or E04 Cause: Burned heater relay on Main Power Control Module | Bosch OEM Power Control Board Module#12009511 | Easy DIY (20 min, color-coded plugs) Est: $132.00 | Check Price on Amazon → |
| Power module board is fine, or E04 alternates with E09 Cause: Shorted heating track inside Circulation Heat Pump | Bosch Circulation Heat Pump Assembly#12008381 | Moderate DIY (35 min) Est: $118.00 | Check Price on Amazon → |
Frequently Asked Questions
Where is the power control board located on a modern Bosch dishwasher?
On Bosch models made after 2012, the main power board (#12009511) is NOT inside the top door—it is housed inside a white plastic box in the bottom-right rear corner of the base pan, right where the power cord plugs in.