Bosch Dishwasher E01: Wash Stops Because the Water Stays Cold

What E01 means

The display flashes E01 and the cycle freezes partway through, often with the tub holding cold or barely warm water and dishes still dirty. Behind it, the control has been timing how long the water takes to climb to the temperature the chosen program asks for. When the reading never gets there inside the allowed window, the machine gives up and stops instead of washing on without enough heat.

Common causes of E01

Hot water not reaching the machine at the start, so the first fill is cold (check this first; a hot refill that clears the code settles it)
Heating element burned out, so the water never warms at all
NTC temperature sensor drifting and reporting the wrong reading
Relay on the control board no longer switching the heater on

✓ One safe check you can try

1. Do not take off any lower panel; the heater runs on 120V right beside standing water. 2. Open the kitchen faucet and let it run until the water turns hot. 3. Close the door and start a new cycle. 4. If E01 comes back even with hot water at the tap, stop and call us. Bosch expects roughly 120°F coming in, so a cold first fill is a known false trigger.

! Why to stop there

Testing a heating circuit with power on puts your hands near a live 120V element in a wet tub.
A cold supply and a dead element look identical on the display, so replacing the element first is a pricey wrong guess.
The sensor and the heater relay share wiring, and disturbing one while testing the other can create a second problem.

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 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 8Bosch Dishwasher Service Test Result 8: Temperature Sensor 16Bosch Dishwasher Service Test Result 16: Spray Diverter E:30Bosch Dishwasher E:30, Voltage Too High and the Machine Shut Down

E01E01 questions

Will unplugging the dishwasher for a few minutes clear E01?

A reset can wipe the message, but if the water still cannot warm up in time the code returns on the next cycle. It only helps when a cold fill was the whole story.

My dishwasher is only two years old. Does that change anything?

Manufacturer coverage depends on your purchase date and terms, so check those before anyone opens the base. Our repair itself carries a 30-day workmanship warranty, and you approve a written price before we start.

How long does a heating repair take?

Most visits are one trip: we diagnose, give you the written price, and fix it on the spot when the part is on the truck. Parts we need to order make it a second visit.