Shared problem guide
Source verifiedUse caution

Dishwasher is not heating water

Confirm the selected programme, clean only user-maintainable filters, and use professional service rather than testing a heater or electrical component.

Common descriptionsWater remains cold · No steam at the end · Poor washing with no heat
Safety boundaryUse caution
Last reviewed 2026-08-17
Safe troubleshooting checks

Safe dishwasher water-heating checks

4 steps
  1. 01

    Confirm the programme is appropriate

    User-level

    Use the exact model manual to confirm that the selected programme suits the load and includes the expected wash and drying behaviour. A short programme may give different results.

    Sources: [2]

  2. 02

    Clean only the user-removable filter

    Use caution

    Switch the dishwasher off and use the exact manual to clean and refit its user-removable filter. Do not open the sump, heater area, or service panels.

    Sources: [2]

  3. 03

    Check for excessive foam

    Use caution

    Visible foam can interfere with operation. Remove it using the excessive-foam guide and correct detergent use before reassessing the dishwasher.

    Sources: [2]

  4. 04

    Treat a persistent no-heat condition as a service issue

    Professional help

    Stop using the appliance and arrange qualified service if it remains cold or repeatedly reports a heating fault. Do not test the heater, temperature sensor, relays, wiring, or control board.

    Sources: [2] [1]

Traceability

Sources & references

2 records
Manufacturer support

Error codes on Siemens dishwashers (opens in a new tab)

Siemens Home Ireland · Accessed

Last reviewed · Review due

Defines Siemens E15 as water in the floor tub and directs the user to turn off the tap and contact service.

Source verified
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