Bosch Dishwasher Error Code E:01

E:01 indicates a fault in the heat pump heater circuit. The dishwasher has detected a problem with the relay controlling the heat pump heater, a disconnection or failure of the heat or drain pump, or low supply voltage reaching the unit. The machine stops the cycle to prevent component damage until the issue is resolved.

No, you should not continue running the dishwasher while E:01 is active. The error indicates the heat pump circuit is not functioning correctly, and running a cycle could result in further damage to the pump, heater, or control board. Resolve the fault before resuming use.

Repair costs vary depending on the root cause. If the fix is simply reseating a loose connection, there may be no parts cost at all. Replacing a drain pump typically runs in the range of $80 to $200 in parts, while a power module replacement can cost between $100 and $300 in parts, not including labor if a technician is hired.

Start by unplugging the dishwasher and firmly reseating the power cord at both the wall outlet and the power module connection point. If the error returns, check the supply voltage at the outlet with a multimeter and inspect the wiring harness connections at the heat pump and drain pump. Persistent faults after those checks typically point to a failed relay on the power module or a defective pump, both of which require component replacement.

A reset may temporarily clear the display, but E:01 will return if the underlying fault has not been corrected. The error is triggered by a real electrical or component condition, not a software glitch. Address the power connection, voltage supply, or faulty component first before attempting a reset.