Favorit ER03

Favorit error code ER03 indicates: Favorit SwissBake / CombiSteam Built-in Pyrolytic Convection Oven: Diagnostic fault code ER03 registered by the microcomputer controller. Built-in oven cavity thermal runaway over-temperature safety cut-out (>340°C recorded) (code ER03).

The primary root cause for Favorit code ER03 is: On Favorit SwissLine and European precision appliances built for high durability engineered with PT1000 platinum RTD probe (1080 Ω at 20°C), 2400W convection circular element (22-25 Ω), radial exhaust cooling turbine (160-220 Ω), and motorized door interlock latch: heating relay contacts welded shut on main power board supplying continuous power to circular convection element. Metrological tolerance verification: cavity PT1000 resistance exceeds 2250 Ω (>340°C); relay normally-open contacts must measure infinite (>10 MΩ)..

To resolve error code ER03: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: disconnect oven immediately at circuit breaker, allow cavity to cool, test relay contacts on PCB for welding. Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: Turn temperature knob to Off. Press and hold Clock and Stop buttons for 5 seconds until confirmation tone sounds, wiping error state from EEPROM.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Favorit code ER03 persists, the physical component causing On Favorit SwissLine and European precision appliances built for high durability engineered with PT1000 platinum RTD probe (1080 Ω at 20°C), 2400W convection circular element (22-25 Ω), radial exhaust cooling turbine (160-220 Ω), and motorized door interlock latch: heating relay contacts welded shut on main power board supplying continuous power to circular convection element. Metrological tolerance verification: cavity PT1000 resistance exceeds 2250 Ω (>340°C); relay normally-open contacts must measure infinite (>10 MΩ). must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test NTC Temperature Sensor Probe (Thermistor) across Across sensor pins 1-2 (unplugged harness). Expected nominal reading is 4.8kΩ–12kΩ (at 20°C–25°C). Tolerance: Negative temperature coefficient: resistance drops smoothly when warmed with fingers. OL = open circuit..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.