Castor F2

Castor error code F2 indicates: Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Evaporator coil sensor failure F2; automatic defrost termination monitoring fails, risking ice accumulation on coil..

The primary root cause for Castor code F2 is: On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Evaporator clip-on NTC probe defective or dislodged from refrigerant return bend, water ingress freezing inside probe sleeve, or open wire..

To resolve error code F2: Remove rear freezer panel. Test evaporator NTC resistance (typically ~2.5 kΩ at 25°C, rising to ~16.3 kΩ at -18°C). Clip firmly to copper return pipe. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Castor code F2 persists, the physical component causing On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Evaporator clip-on NTC probe defective or dislodged from refrigerant return bend, water ingress freezing inside probe sleeve, or open wire. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Compressor Motor Windings (Run/Start) & Defrost Heater across Across 3 compressor pins (Common, Run, Start): R(C-S) + R(C-R) = R(S-R). Winding to earth: >20MΩ (OL).. Expected nominal reading is 15Ω–25Ω (Run C-R), 20Ω–35Ω (Start C-S), 200Ω–400Ω (Defrost Heater). PTC Relay: 10Ω–30Ω at 25°C.. Tolerance: ±10%. Any low insulation resistance to casing (<2MΩ) trips the breaker. Defrost bimetal reads <0.5Ω when sub-zero..

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.