Bosch Dishwasher E01 Error Code: Meaning, Causes & Fix

Heat pump motor circuit fault at the main control board — Bosch's own published definition of E01 on its dishwasher error-code lists, with exactly one published owner remedy: reset power at the breaker for 30 seconds, and if the code is not resolved, contact Bosch Customer Support.

Bosch defines this code more precisely than most. On both its United States and Canadian error-code pages, Bosch states word for word: "Error code E01: There is a heat pump motor circuit fault at the main control board. Reset power to breaker for 30 seconds. If not resolved, call Bosch Customer Support at 1-800-944-2904." The same fault appears in long form as E0100 on displays that show six characters, with the identical definition. Two parts of that sentence matter. First, the circuit named is the heat pump motor circuit: on these Bosch dishwashers the heat pump is the combined unit that circulates the wash water and heats it, and this code reports a fault in the electrical circuit driving its motor. Second, Bosch locates the fault "at the main control board" — the board is where the fault is registered and, on Bosch's wording, where it may sit. E01 is sometimes described elsewhere as a loose family label for the E01 to E05 range. Bosch's own list does not support that: Bosch gives each of those codes a separate definition (E02 and E03 are main control board relay faults, E04 is a heater electronics fault found in self-test, E05 is a wash arm diverter circuit fault). Treat E01 as the specific circuit Bosch names, not as a range heading, and do not borrow symptoms from neighbouring codes — Bosch publishes no symptom list for E01 beyond the definition itself.

What causes the E01 code on a Bosch dishwasher?

A failing heat pump motor or its drive circuit

This is the circuit Bosch names. The heat pump's motor circuit is monitored by the main control board, and a motor or drive-stage failure that takes the circuit out of specification is the central branch of the code — the one a technician's tests are built to confirm or exclude.

A main control board fault

Bosch's definition ends with the words "at the main control board," and its neighbouring codes E02 and E03 are expressly control board relay faults. A board that can no longer drive or correctly read the heat pump motor circuit posts the same code as a failed motor, which is why the two components have to be separated by testing rather than by guessing.

Wiring or connector damage between board and heat pump

The harness linking the control board to the heat pump lives in a hot, wet environment at the base of the machine. Corroded, loose or chafed connections interrupt the same circuit the board is monitoring and produce the same report; a technician inspects the harness and connectors before condemning either major component.

A one-off control glitch

The reason Bosch's only published owner step is a power reset is that a transient control error can also latch this code. If a 30-second breaker reset clears E01 and it stays cleared through full cycles, the glitch branch is the likely explanation; a code that returns is a live circuit fault, not a stuck message.

Checks to run before you replace anything

1. Write down the exact display — E01 or the long-form E0100 — and note what the machine was doing when it appeared; the precise characters decide which Bosch definition applies.
2. Do Bosch's published reset first and exactly as written: switch the dishwasher's breaker off for 30 seconds, restore power, and run a short cycle while you watch for the code.
3. Confirm the basics Bosch's manuals list for a machine that will not start or respond: the door is fully latched and any previous cycle has been properly cancelled and finished.
4. Note anything unusual you can observe from outside the machine — a tripping breaker, a burning smell, water under the door — and stop using the machine if you find any of them.
5. Do not open the base of the machine or test the heat pump circuit yourself: everything past the breaker reset on this code is live-circuit diagnosis inside a wet appliance.

Bosch dishwasher error code e01 how to fix it

1. Confirm the code at the machine and repeat the breaker reset once; a code that returns immediately or mid-cycle is treated as a hard circuit fault from this point.
2. A technician inspects the wiring and connectors between the main control board and the heat pump for corrosion, looseness and heat damage, and repairs the harness branch if the damage is there.
3. The heat pump motor circuit is then tested as Bosch's definition frames it, separating the motor side from the board side — the component that fails its test is the one replaced, not both on suspicion.
4. If the motor circuit tests good, the main control board itself is the remaining branch, matching Bosch's "at the main control board" wording.
5. After any part is replaced, the machine is run through a full cycle and a self-test where the model provides one, and the repair is only signed off when E01 does not return.

The part that usually fails: Heat pump and main control board

On the Bosch models behind this code, one heat pump unit both circulates the wash water and heats it, driven and monitored from the main control board. E01 names the motor circuit of that unit and locates the fault at the board, which is why honest diagnosis is a separation job — prove whether the motor circuit or the board failed before any part is ordered.

Bosch dishwasher error code e01 reset

Bosch publishes exactly one reset for E01, and it is a power reset, not a button sequence: "Reset power to breaker for 30 seconds." Turn the breaker off, wait the full 30 seconds, turn it back on, and run a cycle. There is no Start-button combination in Bosch's documentation that erases E01, because the code is the board reporting a circuit it monitors continuously — if the circuit is still faulty when power returns, the code is posted again, correctly. Bosch's own instruction for that outcome is the end of its definition: if the reset does not resolve it, call Bosch Customer Support (1-800-944-2904 on the US list). A returning E01 is therefore not a reset that failed to take; it is the diagnosis, and it points at the heat pump motor circuit or the main control board.

On Bosch dishwashers, most error codes clear when the cycle is cancelled: hold the Start button for about 3 seconds until the display shows 0:01, let the machine pump out for a minute, then switch off. For many codes a control reset is the next step — switch the machine off, and on models with a physical power switch also cut power at the breaker for a few minutes. A code that returns straight after a reset is an active fault; Bosch controls re-detect it at the next self-check, typically within the first minutes of a new cycle.

Why does the E01 code keep coming back?

E01 comes back when the underlying circuit condition is still present at the next self-check or cycle start: an intermittent connector that opens with heat and vibration, a motor circuit that fails only under load, or a board fault that appears as the machine warms up. A code that returns within the first cycles after a breaker reset is telling you the reset branch is exhausted and the fault is in the hardware; repeated resets do not wear it down.

How to stop E01 coming back

• A failing heat pump motor or its drive circuit: This is the circuit Bosch names. The heat pump's motor circuit is monitored by the main control board, and a motor or drive-stage failure that takes the circuit out of specification is the central branch of the code — the one a technician's tests are built to confirm or exclude.
• A main control board fault: Bosch's definition ends with the words "at the main control board," and its neighbouring codes E02 and E03 are expressly control board relay faults. A board that can no longer drive or correctly read the heat pump motor circuit posts the same code as a failed motor, which is why the two components have to be separated by testing rather than by guessing.
• Wiring or connector damage between board and heat pump: The harness linking the control board to the heat pump lives in a hot, wet environment at the base of the machine. Corroded, loose or chafed connections interrupt the same circuit the board is monitoring and produce the same report; a technician inspects the harness and connectors before condemning either major component.

Retrieving stored fault codes on Bosch dishwashers

Bosch dishwashers store the last errors in a fault memory that can be read in the customer-service/test program (entered with a two-button hold that varies by series — e.g. holding two program buttons while switching on). The test program also steps through fill, heat, wash and drain so a technician can see which stage re-triggers the code. The exact button pair for your series is in the service documentation; the fault memory survives a normal reset, which is why a Bosch technician can still see a code you cleared from the display.

Other Bosch dishwasher error codes

See the full list on the Bosch Dishwasher error codes hub.

Codes E01 gets confused with

E09 — Heating circuit error — the dishwasher's heater is not working (heat pump/heater fault). E09 is Bosch's heating fault: the control drove the heater (on modern Bosch machines the heater is integrated in the circulation 'heat pump') and the temperature didn't rise as expected.

E07 — Drying fan / Zeolith drying fault on equipped Bosch models (the fan in the drying system is faulty) — model-specific member of the E0x block. E07 on Bosch dishwashers with the Zeolith/fan drying system reports a fault in the drying fan circuit: the fan that moves air through the Zeolith chamber (or over the tub in fan-drying models) isn't running or reporting.

E22 — Filter clogged — the filter system is blocked and needs cleaning (a maintenance code, not a breakdown). E22 is Bosch telling you the filters are too clogged to run properly: the control detects the circulation/drain behaving as if the filter is matted (because it is).

E92 — Not one fault but a two-member family in Bosch's current suffixed display format: E:92-10 — spray-arm rotation of the lower spray arm is blocked (or the lower spray arm is not correctly fitted); E:92-40 — filters are soiled or blocked. Bosch publishes no standalone 'E92' definition without its suffix. Current Bosch manuals print fault codes as E:XX-XX, and the number after the dash is not decoration — each suffixed code gets its own row, its own cause and its own remedy in Bosch's troubleshooting table.

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Facts on this page were checked against manufacturer documentation: www.bosch-home.ca · www.bosch-home.com · www.bosch-home.com · washingcodes.com · manuals.plus · mans.io