Miele Dishwasher F24 Error Code: Causes & Fix

What is the Miele Dishwasher F24 error?#

F24 on a Miele dishwasher is a heating-relay fault: the relay on the control board that switches the heater has stuck or failed, so the board can no longer safely control heating and stops the cycle. Because it involves the board and mains-switched heating, this is a professional-only code — I do not recommend owner intervention. The only safe DIY step is to power the machine down fully; if F24 comes straight back, book a technician rather than reopening the cycle.

F24 on a Miele Dishwasher: likely causes and repair cost#

On a Miele Dishwasher, the F24 code signals: heating relay fault.

Typical professional repair: $400–$700 · Difficulty: professional only · usually a technician job

Symptoms that often accompany F24: No heating at all; Continuous heating (dangerous); Burning smell from control area; Tripped circuit breaker

Technician diagnostic sequence for F24:

1. Test the heater relay on the ELP board for proper switching
2. Measure heater element resistance (should be 10-30 ohms)
3. Check for burnt traces on the control board near the relay
4. Inspect wiring from board to heater for damage or melting
5. Replace ELP control board if relay is welded shut or open

Parts a technician may check or replace: Miele ELP control board; if shorted

Field note: A relay stuck closed causes continuous heating — check for this urgently. A relay stuck open means no heating. Miele ELP boards are model-specific; verify the exact part number from the rating plate.

Safety note: A stuck-closed relay is a fire hazard. If the dishwasher is overheating, disconnect power immediately and do not use until repaired.

How to troubleshoot the F24 error yourself#

I will be direct: there is very little an owner should do with F24, and that is deliberate. You can perform one power-down at the breaker and restart a short program to rule out a momentary glitch. If the code returns, stop there. Everything past that point — confirming whether the relay is stuck open or closed, checking for a control-board fault, or inspecting heater wiring for damage — means working around the mains-switched heating circuit inside the control housing, which carries a real shock risk and needs proper isolation and a meter. This is why the fault is rated professional only. Attempting a board-level relay diagnosis without training risks both your safety and further damage, so the right move is to hand it to a technician after the single reset attempt fails.

Is the Miele Dishwasher F24 error worth fixing?#

Worth fixing, but this is the one dishwasher code where I tell owners to weigh it honestly. A professional F24 repair runs $400–$700 because it usually means replacing the control board, the most expensive part in the machine. On a newer or mid-life Miele that total is still short of half the price of a new unit, so repair is the sound choice. On a very old dishwasher already showing other faults, a board that costs this much can tip past the point of reason — that is the situation where I would talk through replacement instead.

Miele Dishwasher F24: frequently asked questions#

What does F24 mean on a Miele dishwasher?#

It is a heating-relay fault: the relay on the control board that switches the heater has stuck or failed, so the board stops the cycle rather than lose control of heating.

Is it safe to keep using a dishwasher with F24?#

No — I would not keep running it. A stuck heating relay is a control fault on the mains-switched heater, so leave it off until a technician has checked it.

Can I clear F24 myself?#

Only by one power-down to rule out a glitch. A persistent F24 is a board-level, mains-circuit fault and must be handled by a technician.

How much does F24 repair cost?#

A professional repair runs $400–$700, driven by the cost of replacing the control board that carries the failed relay.

Which parts fail when a dishwasher shows F24?#

The heating relay on the control board, which usually means the board itself. Damaged heater wiring is a less common contributor.

Why does a stuck relay trigger F24?#

If the relay cannot switch the heater on or off as commanded, the board can no longer guarantee safe heating, so it shuts down and reports F24.