Novomatic RF13

Novomatic error code RF13 indicates: Novomatic KG / KS Series Combi Refrigerator & Upright Freezer Range: Diagnostic fault code RF13 registered by the microcomputer controller. Evaporator condensate drain trough anti-freeze foil heater open circuit, causing ice damming in freezer.

The primary root cause for Novomatic code RF13 is: On Novomatic Austrian and Central European retail OEM chassis appliances engineered with Austrian retail cooling loop with R600a hermetic compressor, dual 5.0 kΩ NTC temperature sensors, and defrost safety bi-metal: aluminum foil heating trace fractured from thermal cycling or severed power lead during evaporator servicing. Metrological tolerance verification: foil heater resistance 850-1150 Ω at 20°C (rated 45-60W at 230 VAC); dielectric insulation to liner > 20 MΩ..

To resolve error code RF13: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: melt ice dam with hot air; disconnect drain heater and measure resistance with multimeter expecting 850-1150 Ω; replace foil. Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: turn mechanical thermostat knob to Off (position 0), unplug power cord for 5 minutes, reconnect and rotate thermostat back to setting 3.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Novomatic code RF13 persists, the physical component causing On Novomatic Austrian and Central European retail OEM chassis appliances engineered with Austrian retail cooling loop with R600a hermetic compressor, dual 5.0 kΩ NTC temperature sensors, and defrost safety bi-metal: aluminum foil heating trace fractured from thermal cycling or severed power lead during evaporator servicing. Metrological tolerance verification: foil heater resistance 850-1150 Ω at 20°C (rated 45-60W at 230 VAC); dielectric insulation to liner > 20 MΩ. 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.