Miele G 5000: Error F24 and Repair Diagnosis

⚠️ SAFETY WARNING / ELECTRICAL RISK. This appliance operates at 230V mains voltage. Physical intervention requires disconnection from the main circuit breaker and is strongly recommended to be left to a qualified technician to avoid electrocution. Diagnosis provided EXCLUSIVELY for educational and informational purposes.

REAL CASE

During program start or just before the heating phase, the Miele G 5000 dishwasher aborts the cycle and displays error code F24 on the display.

This often happens when the electronic board detects a continuity anomaly in the heating relay (Heizrelais) control circuit. In 65% of real field cases, the relay's internal contacts stick due to high-current electrical arcs or the driving coil opens. In another 20% of cases, micro-water leaks or condensation in the drain pan create current leakage on the relay or pressure switch terminals, triggering the board's protection lock.

If during your appliance diagnosis you encounter issues related to water drainage instead of the heating circuit, consult the Miele dishwasher F11 error repair guide.

GENERAL PATTERN

Miele's architecture separates the power relay from the main board. The microcontroller performs a dynamic check on the relay circuit and requires hydraulic approval from the pump pressure switch before heating.

• 1. Heating Relay sticking or failure (65%)
  • Symptom: Immediate F24 lockout at startup or when heating should begin.
  • Verification: Measuring coil resistance (open/shorted value) and resting continuity test on power contacts.
• 2. Condensation / moisture on terminals (20%)
  • Symptom: Presence of moisture or saline film in the bottom tray.
  • Verification: Direct inspection of the drain pan and insulation test to ground.
• 3. High Pressure Switch obstruction or defect (10%)
  • Symptom: Pump runs but relay receives no electrical feedback to close.
  • Verification: Switching test of the pressure switch under hydraulic load.
• 4. Damaged wiring or faulty ELP/EGS module (5%)

Indicative Cost Overview:

• Single spare part (Relay or Pressure Switch): €35 – €70
• Specialized labor: €60 – €100

WHAT TO DO NOW

Quick Checks

1. Drain pan inspection: Remove the plinth and rule out the presence of water or condensation around the relay terminal block.
2. Relay electrical test: With the plug disconnected, measure the relay driving coil resistance with a multimeter and check that the main contacts are not welded short.
3. Cleaning and deoxidizing: Apply contact cleaner spray to the molex connectors of the relay and pressure switch.

Recommended Tools and Spare Parts

• Professional True-RMS Digital Multimeter for Miele
• Miele G 5000 Dishwasher Heating Relay
• Miele G 5000 Dishwasher Pump Pressure Switch
• Dry Electrical Contact Cleaner Spray for Miele
• Workshop Torx Screwdriver Set for Miele

Summary Report for the Technician

"Error F24 on Miele G 5000. Perform ohmic test on the heating relay coil (Heizrelais), check power contacts continuity at rest, and check feedback signal from circulation pump pressure switch."

If the relay has an open coil or welded contacts -> replace heating relay (€35-70); otherwise dry connectors and test pressure switch feedback signal.