Fault Code F25: Target Temperature Fault; Fault Code F26: Boiling Protection - Miele G 1 Series Technical Information

G 1xxx/G 2xxx
3.21

Fault Code F25: Target Temperature Fault

Symptom:
See Table 080-3 for model-specific fault indications.
Background information: During the heating stage, the desired temperature
has not been reached within the given time (minimum 75 minutes). In
subsequent wash blocks, after this fault has been registered, the heater is not
activated and no rinse aid is dispensed.
Cause:
Heater defective.
Remedy:
Replace the heater.
Cause:
Heater relay defective.
Remedy:
1. Check the heater relay solenoid.
2. Check the heater relay solenoid voltage (12VDC) from the electronic.
3. Replace the electronic, if necessary.
Cause:
Excess quantity of detergent or rinse aid dispensed. Excess foam has developed.
Excess foam can cause a drop in water flow pressure, directly affecting the Heater
pressure switch.
Remedy:
Check the dispensed quantities of detergent and rinse aid. Clean out excess
foam and follow the information given in the operating instructions.
3.22

Fault Code F26: Boiling Protection

Symptom:
The program is interrupted and the drain pump is operated.
See Table 080-3 for model-specific fault indications.
Cause:
Temperature at NTC temperature sensor has exceeded 194°F (90°C).
Remedy:
Check the heater relay and replace it if necessary.
Cause:
NTC temperature sensor providing inaccurate information.
Remedy:
Replace the NTC temperature sensor. See Section 050-4.24.
Cause:
Heater relay closed.
Remedy:
Replace the heater relay.
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Technical Information