FAQ
TL;DR: Community repairs report 2-year reliability after a dual-module firmware reflash—“This guarantees two years of module work”—for Samsung CTN464NC01 hobs showing FL with odd fan ramping. See steps below. [Elektroda, Pawel1812, post #16684100]
Why it matters: This FAQ helps DIYers and technicians quickly diagnose FL/LE/F0–F2 errors and choose proven fixes for Samsung CTN464NC01 / XEO induction hobs.
Quick Facts
- Symptom snapshot: FL appears a few seconds after heating starts with a pan detected. [Elektroda, WIIW82, post #16664758]
- LE means low DC: 12 V rail drops below 9 V; inspect LV transformer wiring first. [Elektroda, Piotr2608, post #16664769]
- F0/F1/F2 indicate a communication error between modules/boards. [Elektroda, Piotr2608, post #19007769]
- Reflashing both control modules has restored stability for ~2 years in field reports. [Elektroda, Pawel1812, post #16684100]
- Processors sit under heat sinks; stickers show software version for identification. [Elektroda, Barthezz1976, post #17312710]
What does the FL error mean on a Samsung CTN464NC01 hob?
In this model, users see FL within seconds of starting heating and often with irregular fan ramping. Forum repairs link FL to control firmware on both power modules. A working fix has been reprogramming (“substituting the software”) on both modules, which restored stable operation. One expert noted it “guarantees two years of module work.” [Elektroda, Pawel1812, post #16684100]
How do I fix the FL error step-by-step (pro method)?
- Disconnect mains and access both power modules.
- Use the programming connectors next to the heat sinks to reflash both processors with the correct software.
- Reassemble, power up, and test each zone with a suitable pan. “I remove these glitches by substituting the software in prots on both modules.” [Elektroda, Pawel1812, post #16684100]
How can I reproduce the FL fault to diagnose it?
Power on the hob, place a compatible pot, start heating, and observe. Users report FL appears after a few seconds of heating following normal power-up and pan detection. This behavior helps confirm the symptom before repair or module reflash. [Elektroda, WIIW82, post #16664758]
Is the cooling fan the culprit, and how much does it cost?
Some users replaced the fan (~PLN 200), but the fault returned. The community fix shifted to reflashing both modules, which eliminated repeat comebacks. Edge case: a new fan alone may not resolve FL if firmware control is at fault. [Elektroda, Pawel1812, post #16684100]
Which relays control the fan on this board?
The thread doesn’t map specific fan relays. What’s documented is odd fan ramping before FL and successful repair via firmware reflash. If you’re tracing hardware, start at the fan connector, but expect a software-rooted cause based on reports. [Elektroda, jaboleq, post #16682309]
What does the LE error mean, and how do I check it?
LE signals low DC voltage; the 12 V line has fallen below 9 V. Unplug the appliance and reseat wiring between the low‑voltage transformer and the control board. If wiring is sound, replace the harness, then the transformer, then the control board. [Elektroda, Piotr2608, post #16664769]
What are F0, F1, and F2 errors on this hob?
F0, F1, and F2 indicate a communication error between boards. Inspect the interconnects, harness, and connectors for damage or poor contact before considering board-level service. “F0, F1, F2 – Communication error.” [Elektroda, Piotr2608, post #19007769]
Where should I look on the board first for an F0 code?
Focus on the communication path. Reseat and inspect the harnesses linking the user/control section and power modules. Clean and secure the connectors, then retest. If F0 persists, deeper board diagnostics or reflash may be needed. [Elektroda, Piotr2608, post #19007769]
Are there programming connectors on this model for firmware service?
Yes. The modules include programming connectors located next to the heat sinks. Technicians used these to reprogram both processors without heavy disassembly during successful FL repairs. [Elektroda, Pawel1812, post #16684100]
Where are the processors, and how do I identify software versions?
The processors sit under the heat sinks. Look for stickers on the processors that indicate software versions. Photograph them for records before any firmware work. [Elektroda, Barthezz1976, post #17312710]
What does “prots” mean in the repair notes?
“Prots” is shorthand for processors (microcontrollers) on the hob’s modules. The documented fix replaces or reflashes software in the processors on both modules to clear FL. [Elektroda, Piotr2608, post #17313023]
How long does the firmware reflash fix typically last?
One expert reported two years of trouble‑free operation after reflashing both modules. That duration is the best available statistic from the thread for field reliability. “This guarantees two years of module work.” [Elektroda, Pawel1812, post #16684100]
