AEG RCB736E5MX Refrigerator Freezer Defrost Error Diagnosis Guide
Generated by ReeFix AI · Sources: technical and specialist documentation (see Sources section)
Revision of 10/06/2026
WARNING ⚠️ ELECTRICAL HAZARD. This appliance operates with high voltage or residual charges. Physical intervention is extremely dangerous and it is strongly recommended to entrust it to a qualified specialized technician to avoid electrocution. ReeFix provides this diagnosis EXCLUSIVELY for educational and informational purposes.
Quick Diagnosis Defrost Error AEG RCB736E5MX
The defrost error with ice and temperature problems in your AEG RCB736E5MX indicates a No-Frost system failure. The most probable cause (65-75%) is a defect in the defrost heater or the evaporator temperature sensor (thermistor). This often happens due to excessive ice buildup that blocks airflow.
Less probable (15-20%) is a defect in the defrost thermostat/bimetal or the main control board (PCB) in the defrost circuit. A faulty AEG RCB736E5MX Evaporator Fan Motor can worsen the problem, but rarely causes the specific error.
Checks (technician only): Measure continuity of the AEG RCB736E5MX Defrost Heater and resistance of the AEG RCB736E5MX Evaporator Temperature Sensor. If intact, check the AEG RCB736E5MX Defrost Thermostat and AEG RCB736E5MX Main Control Board.
Decision: Given the electrical risk, contact a qualified technician. If the quote exceeds 50% of the new value, consider replacement.