FAGOR F4

FAGOR error code F4 indicates: FAGOR F4: Cooling circuit or defrost system anomaly in Refrigerator / Freezer; compartment temperature deviation..

The primary root cause for FAGOR code F4 is: The heating element that melts ice off the evaporator coils during a defrost cycle has failed..

To resolve error code F4: This will cause excessive frost buildup and poor cooling. The defrost heater needs to be tested and replaced.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if FAGOR code F4 persists, the physical component causing The heating element that melts ice off the evaporator coils during a defrost cycle has failed. 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.