Hotpoint Dishwasher Error F03

DIY Fix Check dishwasher drain path and filters

1. Turn off and unplug the dishwasher.
2. Open dishwasher and remove lower rack.
3. Inspect and clean the drain filter and sump area of debris.
4. Check the drain hose (under sink) for kinks or obvious blockages.
5. Re‑assemble and run a short cycle to see if the error clears.

DIY Fix Check heating/temperature symptoms

1. If dishes are consistently cold or not drying, note if this correlates with the error.
2. Run a cycle and feel if water is heating early in the cycle (take care to avoid burns).
3. If no heat is felt, note this for technician diagnosis.

Technician Only Diagnose and repair drain components

1. Check and test drain pump operation and continuity.
2. Clear or replace clogged/broken drain hose or check valve.
3. Inspect sump and macerator components for mechanical jamming.
4. Verify drain sensor and control board signals related to drain cycle.

Parts needed: drain pump, drain hose, check valve, sump components

Technician Only Diagnose and repair heating/temperature system

1. Test temperature sensor/thermostat (NTC) for correct resistance values at known temperatures.
2. Verify heating element continuity and power delivery.
3. Check wiring harness and connectors for damage or opens.
4. Replace temperature sensor or thermostat if found faulty.

Parts needed: temperature sensor (NTC), thermostat, heating element, wiring harness