New and materially updated troubleshooting paths, ordered by their latest editorial review date.
Bosch support lists E31 / F31 for dishwasher model families in some regions. On the supported BSH platform it is a drying-system fault that can leave the machine operating without normal heating or drying. Do not confuse E31 / F31 with E31-00 / E3100, which is a different water-protection code.
A red or flashing LOS light on many fiber ONTs means the optical link is missing or too weak. Nokia documentation identifies red alarm/PON-off states with LOS/LOF, while TP-Link describes red LOS as an optical-signal failure. Check only safe external cable routing and then involve the fiber provider if the light remains red.
Samsung groups 4C2 with hot/cold supply errors such as 4E2, CE, 14C2, and nF1. On supported models the cold inlet is receiving water that is too hot, most commonly because the hot and cold supply hoses are connected to the wrong inlets.
Samsung uses 5C / 5E for a drainage problem on supported washing machines. The first checks are the drain hose, its installation, and the user-accessible debris or pump filter where the model provides one.
Samsung uses dE / dC on supported washing machines when the door or lid is open, obstructed, overloaded, or cannot be confirmed as securely closed.
“No Signal”, “Unsupported Signal”, “Invalid Format”, and similar HDMI messages mean the TV is not receiving a video format it can display from the selected input. Check the source, cable, direct connection, resolution and refresh-rate path before assuming the TV input has failed.
When 0x00000214 appears while adding a shared or network printer, the failure is commonly in the printer connection or driver-install path. Confirm the printer share and network first, then reinstall it using current Windows printer guidance instead of applying registry workarounds.
Microsoft documented a Windows issue where some USB-connected dual-mode printers that support both USB Print and IPP over USB unexpectedly printed raw IPP headers and random characters. Pages often began with POST /ipp/print HTTP/1.1, Connection: Keep-Alive, or Windows Internet Print Provider. Microsoft resolved the known issue in later Windows updates.
Newer Bosch dishwasher manuals use the E:30-00 display when the water-protection system is activated. Bosch's model documentation instructs the user to turn off the water tap and call Customer Service. This page is scoped to that newer E:30-00 display rather than treating it as a duplicate spelling of E15.
Bosch defines dishwasher E01 as a heat-pump motor circuit fault at the main control board. It is not the same as E02: Bosch assigns E02 to a main-control-board relay fault.
Bosch defines dishwasher E02 as a main control board relay fault/error. Unlike E01, Bosch does not identify E02 as the heat-pump motor circuit; the fault domain is the board's relay/control switching.
Bosch's US support defines E15 as the safety switch detecting water in the dishwasher base, which activates the leakage-protection system. The correct user response is to stop the water inflow and contact Bosch support rather than repeatedly resetting or tilting the appliance.
Bosch dishwasher E24 is primarily a waste-water drainage-path fault. Bosch documentation points to a kinked or blocked drain hose, a sealed/blocked siphon or air-gap connection, and on some models a loose pump cover as the main user-checkable causes.
Bosch dishwasher E25 specifically indicates that the drain pump is blocked or that the drain-pump cover is loose or missing on supported models. That makes E25 more pump-specific than the broader E24 drain-path condition.
Bosch washer E16 / F16 means the door is open or the control cannot confirm that it is properly closed. Bosch's user-level guidance is to close the door correctly and contact service if the code remains.
Bosch washer E27 / F27 indicates a pressure-sensor fault on supported models. Bosch states that this fault is not a normal user repair and recommends arranging service.
GE Appliances says the H2O Supply message on supported front-load washers appears when the machine cannot establish the expected water level. The official guidance specifically points to closed water valves or a pressure-sensor problem, with extremely low household water pressure as a less common cause.
Samsung currently groups 2E with its washer voltage-error family. The code means the washer detected an irregularity in the electrical current or supply, so the useful first checks are the power source, dedicated circuit, extension-cord use, and whether a power interruption or breaker event occurred.
Samsung groups 9C1 with washer voltage errors. On supported Active DualWash models Samsung specifically describes 9C1 as an over-voltage/electronic-control condition, so the first checks are the incoming power supply and whether the washer is on a proper dedicated circuit.
Samsung identifies 9C2 as a washer voltage error and, on supported Active DualWash models, specifically as low voltage. The useful first checks are the plug, wall supply, and whether the washer is being fed through an unsuitable extension or overloaded circuit.
Samsung specifically defines dC3 (and ddC) as an Add Door error on washer models equipped with that small secondary door. The control cannot confirm that the Add Door is closed and locked, so troubleshooting should stay focused on the Add Door opening, latch, trapped items, and visible damage rather than the main washer door.
Samsung includes FL in its normal washer door-error group, meaning the main door is not detected as closed and locked. This differs from dC3/ddC, which Samsung reserves for the Add Door on models that have the smaller secondary opening.
On supported Samsung FlexWash and washer-dryer combo families, HC2 points to the drying-heater system rather than the normal wash-water heater. Samsung's FlexWash guidance says to power-cycle once and seek service if HC2 returns.
Samsung groups Hr with washing-machine heater errors, and older model-specific Samsung support describes Hr as a heater-relay operation fault. This is a wash-heating/control problem, not the washer-dryer HC2 drying-heater condition.
Samsung defines PC (also PE on some models) as a clutch-position error: the washer cannot determine the clutch's position. This is distinct from PC1, where a clutch position was detected but the Hall-sensor signal is then abnormal.
Samsung defines PC1 (also PE1 on some models) as an abnormal clutch Hall-sensor signal after the clutch position has already been detected. That makes PC1 a feedback-signal fault rather than the basic 'position cannot be detected' PC condition.
Samsung lists SF, along with 5F and SF1/SF2/SF3 variants, as a washer system error. Unlike 2E, which Samsung places in the voltage-error family, SF does not have a normal external plumbing or load-balancing fix; Samsung's user-level path is a brief power reset followed by service if the error returns.
Whirlpool service documentation associates dishwasher F5E1 with a door-switch problem. The important distinction from F5E2 is that F5E1 concerns the control not seeing the expected door-switch state during operation, while F5E2 is tied to the control expecting the door to have been opened between cycles.
Whirlpool dishwasher service documentation associates F5E2 with the control expecting a door-open event between cycles but not detecting one. Typical context includes starting a new cycle without the door having been opened since the previous cycle or a door-switch contact that remains stuck closed.
Whirlpool defines dishwasher F9E1 as a Long Drain condition: the machine is not removing water within the expected time. Whirlpool's user-level checks focus first on the filter, drain hose, disposer connection, air gap, installation, and excessive suds rather than assuming the drain motor itself has failed.
Whirlpool defines dishwasher F9E2 as a Drain Motor Error. External restrictions still need to be ruled out first, but unlike the F9E1 long-drain code, a returning F9E2 specifically points the diagnostic path toward the drain-motor system after the disposer, hose, and installation checks are cleared.
Whirlpool documents F8E5 on supported Laundry Tower washer sections as a reversed water-supply condition. The first checks are installation-specific: verify hot-to-hot and cold-to-cold connections, then reset the control for five minutes.
On supported Whirlpool top-load washers, HC is an end-of-cycle installation warning that the hot and cold inlet hoses are reversed. Whirlpool tells users to shut off the water, swap the connections, and run another cycle to verify the correction.
Bosch dishwasher E20 indicates an internal heater fault in the heat-pump assembly on supported models. Bosch recommends a brief power reset and service if the code returns.
Bosch dishwasher E21 means the heat pump is blocked on supported models. This is distinct from E20, which Bosch defines as an internal heat-pump heater fault.
On many Brother inkjet models, “Unable to Print 46” is associated with the internal ink absorber or purge system reaching its service limit.
Error 5100 on many Canon inkjet printers indicates that the carriage cannot move or be positioned normally because of an obstruction, paper scrap, packing material, or carriage mechanism fault.
B200 on many Canon inkjet models points to a serious printhead or printhead-control condition, often involving abnormal temperature or electrical detection.
On many HP DeskJet families, E4 indicates a paper-jam condition or paper-path obstruction. The exact display can differ by model, so use the full model number.
The 1E display on many Samsung dishwashers indicates that the filter or water-level path needs attention. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 3C display on many Samsung dishwashers indicates that the wash pump is not operating as expected. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 4C / 4E display on many Samsung dishwashers indicates that the dishwasher is not receiving enough water. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 5C / 5E display on many Samsung dishwashers indicates that the dishwasher cannot drain correctly. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 7E display on many Samsung dishwashers indicates that the WaterWall reflector cannot move correctly. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 9E display on many Samsung dishwashers indicates that the dishwasher detected an insufficient water level. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The AP display on many Samsung dishwashers indicates that the dishwasher is in Wi-Fi setup mode. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The bC2 display on many Samsung dishwashers indicates that a button has been pressed continuously. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The bE / 6E display on many Samsung dishwashers indicates that a control-panel button is held or stuck. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The CE display on many Samsung dishwashers indicates that the control modules are not communicating. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The dC display on many Samsung dishwashers indicates that the dishwasher door is not latched. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The HC / HE display on many Samsung dishwashers indicates that the water temperature or heater is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The HC2 display on many Samsung dishwashers indicates that the drying heater temperature is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The LC / LE display on many Samsung dishwashers indicates that the leak sensor detected water in the base. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The LC1 display on many Samsung dishwashers indicates that water was detected in the dishwasher base. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The OC / OE display on many Samsung dishwashers indicates that the dishwasher detected too much water. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The PC display on many Samsung dishwashers indicates that the zone-wash diverter position is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The PC1 display on many Samsung dishwashers indicates that the diverter position cannot be confirmed. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The PE display on many Samsung dishwashers indicates that the half-load or zone-wash connection is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The tE display on many Samsung dishwashers indicates that the temperature sensor signal is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 1C / 1E display on many Samsung washing machines indicates that the water-level sensor signal is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 3C / 3E display on many Samsung washing machines indicates that the motor or motor feedback is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The 4C / 4E display on many Samsung washing machines indicates that water is not entering correctly. Codes can vary by model, so match the full model number to the official manual before ordering parts.
Samsung 5d is a display variant of Sd or SUd on supported washers and means excessive suds were detected. The washer normally pauses and extends rinsing until foam falls, then continues automatically; 5E or 5C is a different drainage fault.
The 8C / 8E display on many Samsung washing machines indicates that the vibration sensor signal is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The A0 display on many Samsung washing machines indicates that the washer is in a test-related mode. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The AC / AE display on many Samsung washing machines indicates that the control boards are not communicating. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The AC6 display on many Samsung washing machines indicates that communication with the inverter is interrupted. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The bC / bE display on many Samsung washing machines indicates that a control-panel button appears stuck. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The dC1 display on many Samsung washing machines indicates that the main door lock signal is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The ddC display on many Samsung washing machines indicates that the AddWash door was opened without pausing. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The E2 display on many Samsung washing machines indicates that a control-panel key is stuck. Codes can vary by model, so match the full model number to the official manual before ordering parts.
The HC / HE display on many Samsung washing machines indicates that the water-heating system is abnormal. Codes can vary by model, so match the full model number to the official manual before ordering parts.