Bosch Dishwasher E01 — What It Means & How to Fix It
Bosch's control board has flagged a fault in the circuit that drives the heat pump motor — the part that both circulates and heats the water — so beyond a single power reset, E01 is a board-level repair for a technician.
What this code means
E01 points at the heat pump motor's drive circuitry on the main control board rather than at the tub or filters. On modern Bosch dishwashers the “heat pump” is the combined unit that pumps water through the spray arms and warms it on the way, and E01 means the board cannot drive or monitor that motor as expected. Because the fault sits in mains-voltage electronics, it is not a clean-the-filter job.
E01 is reported consistently across recent Bosch dishwasher generations. A single power-cycle is worth trying in case a surge confused the board, but a code that comes straight back is hardware.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Triac or relay that drives the heat pump motor has failed on the main control board | Common | No — technician job |
| Wiring or connector between the board and the pump motor is loose or corroded | Occasional | No — technician job |
| The heat pump motor winding itself has shorted or gone open | Occasional | No — technician job |
| One-off control glitch after a power surge or brownout | Less common | Yes — power reset only |
What you can try yourself
- Switch the dishwasher off at the wall socket or breaker, wait two full minutes, then restore power — a surge-induced glitch clears here and lets a normal cycle start.
- Begin a short program and watch whether E01 reappears within the first minute, noting how quickly it returns since that helps the technician.
- If the code comes back, stop using the machine; the remaining causes all live on the control board or the motor's mains wiring, none of which are user-serviceable.
- Have your model and serial number ready — they are on the sticker along the right edge of the door — when you book service, as E01 usually means a board or pump diagnosis.
When to call a technician
- E01 returns immediately after a power reset, showing the fault is hardware rather than a transient glitch.
- The dishwasher is silent at the start of a cycle, with no pump hum at all.
- A breaker trips or you smell hot electronics when the machine powers up.
Typical professional repair cost: A diagnostic visit is typically $90–$160; a control board replacement commonly runs $250–$450, and a heat pump unit can be similar depending on the model.
Frequently asked questions
Can I reset a Bosch dishwasher E01 error myself?
Yes — cutting power at the breaker for a couple of minutes and restoring it is the one safe step to try, and it clears E01 if a power blip caused it. If the code returns on the next cycle, the fault is in the control board or pump wiring and needs a technician.
What is the heat pump on a Bosch dishwasher?
It is the combined component that circulates water to the spray arms and heats it as it passes through, replacing the older separate pump-and-element design. E01 refers to the electrical circuit that drives that pump motor, not to a refrigeration-style heat pump.
Is E01 expensive to fix?
It depends on whether the control board or the pump motor is at fault. Board replacements often land in the $250–$450 range installed, so it is worth getting a firm diagnosis before deciding between repair and replacement on an older machine.
Related Bosch codes
- Bosch Dishwasher E15 Water reached the base pan under the tub and Bosch's leak protection locked the machine — sometimes a genuine leak, often a one-off spill or condensation that clears once the base dries.
- Bosch Dishwasher E24 The dishwasher can't drain properly — start with the filter, then the drain hose path, and don't skip checking that the drain pump cover is seated.
- Bosch Dishwasher E25 The drain pump itself is blocked or its cover is loose — and Bosch makes the pump cover owner-accessible, so this is one of the most fixable codes the brand throws.
- Bosch Dishwasher E09 The heating system isn't raising the water temperature — beyond one reset, the flow-through heater is a mains-voltage part that belongs to a technician.
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