Dishwasher
2E
The 2E error code on an LG dishwasher points to a problem with the water supply — specifically, the appliance isn’t detecting enough water entering the machine within the expected time. It’s one of the more common LG dishwasher faults and, reassuringly, it’s often caused by something simple you can fix yourself in under 30 minutes. In this guide, we’ll walk you through exactly what’s triggering the error, the most likely culprits, and a clear set of steps to get your dishwasher running again — including honest advice on when to call in a professional.
What does this error mean?
The 2E error code on LG dishwashers is a water inlet error. When your dishwasher starts a cycle, it opens the inlet valve and expects the drum to reach a minimum water level within a set time window (typically around 10 minutes). If the water level sensor — also called the turbidity or flow sensor — doesn’t register that enough water has entered, the machine aborts the cycle and displays 2E. In plain terms: your dishwasher is saying ‘I tried to fill with water, but something went wrong.’ This could mean water isn’t getting in at all, it’s getting in too slowly, or the sensor measuring the water level is faulty. It’s worth noting that on some LG models this code can also appear as ‘2E’ or be listed in the manual as a ‘Water Supply Error’ — they all mean the same thing.
Est. repair cost
DIY fix: £0 (reset/hose/tap check) to £15–£35 (replacement inlet valve). Professional repair: £120–£220 all-in, including call-out, diagnosis, and a new inlet valve or sensor if required.
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Reset the dishwasher: Before anything else, switch the dishwasher off at the wall socket, wait 60 seconds, then switch it back on and start a new cycle. A one-off glitch in the control board can sometimes trigger a false 2E error, and a hard reset is the fastest thing to try. No tools needed.
Step 2 — Check the water supply tap is fully open: Open the cupboard beneath your kitchen sink and locate the isolation tap on the inlet hose. It should be fully open — the lever or slot should be running in line with the pipe, not across it. If it’s been knocked partially closed, open it fully and restart the machine.
Step 3 — Inspect the inlet hose for kinks: Pull the dishwasher slightly forward from under the counter (you may need a second pair of hands) and trace the inlet hose from the machine to the wall connection. Look for any bends, kinks, or tight curves that could be restricting flow. Straighten any kinks gently and re-run the cycle.
Step 4 — Clean the inlet valve filter: Turn off the water supply tap under the sink and disconnect the inlet hose from the back of the dishwasher (have a towel and small bowl ready — residual water will spill). Look inside the inlet port on the dishwasher — you’ll see a small mesh filter. Remove it carefully with needle-nose pliers or a flat-head screwdriver, rinse it under the tap to remove limescale and debris, then refit it and reconnect the hose. This is one of the most effective fixes for 2E errors in hard water areas.
Step 5 — Check your household water pressure: Run the cold tap at your kitchen sink at full flow. If the flow seems unusually weak compared to normal, your mains pressure may be the issue. Contact your water supplier (e.g. Thames Water, Severn Trent, Scottish Water) to report low pressure — this is a free service and they are obliged to investigate. UK regulations require a minimum of 1 bar at the stop tap.
Step 6 — Run a hot water tap before starting the cycle: On some LG models, if the water in the supply pipe is very cold or the pressure fluctuates at startup, the machine can time out. Running the hot tap at the sink for 30 seconds before starting the dishwasher can sometimes help stabilise the supply and avoid the error — worth trying if other steps haven’t resolved it.
Step 7 — Inspect the base of the machine for a flood protection trigger: LG dishwashers have a flood protection float in the base tray. If water has previously leaked into the base (from any cause), this float rises and can lock the machine into an error state — sometimes displaying 2E. Carefully tilt the dishwasher forward slightly to check if water drains from the base. If it does, dry the base out thoroughly with a towel before retesting. Important: identify and fix the source of the original leak before using the machine again.
Step 8 — Test or replace the water inlet valve (advanced DIY): If all the above steps fail, the inlet solenoid valve itself is the most likely culprit. Replacement inlet valves for LG dishwashers are widely available online for £15–£35. You’ll need to remove the lower kick plate or access panel (usually held in place by 2–4 screws), disconnect the wiring connector and hoses from the old valve, and fit the new one. Only attempt this if you are confident working around appliance electrics — always unplug the machine first and ensure the water supply is off.
Step 9 — If you suspect the water level sensor: The pressure sensor/water level sensor is located in the sump area at the base of the machine. Accessing and testing it requires removing the lower spray arm, filter assembly, and in some cases the sump cover. This is a more involved repair — if you’re not comfortable at this stage, this is the point to call a professional appliance engineer.
📞 When to call a professional
You should call a qualified appliance repair engineer if: the error persists after completing all the DIY steps above; you’ve replaced the inlet valve and the fault is still present; you found water in the base tray and can’t identify where it came from; or you have any doubt at all about working safely with the appliance’s internal electrics. When you call, tell the engineer: ‘My LG dishwasher is showing a 2E error code — a water inlet fault. I’ve already checked the supply tap, cleaned the inlet filter, inspected the hose for kinks, and reset the machine, but the fault remains.’ This saves diagnostic time and money. Look for engineers registered with Which? Trusted Traders or members of the Domestic Appliance Service Association (DASA). Expect a call-out and diagnosis fee of around £60–£90 in most UK regions before parts.
⚖️ Repair or replace?
For most LG dishwasher 2E faults, repair is the right call — especially if your machine is under 8 years old. The most common fix (cleaning the inlet filter or replacing the inlet valve) costs very little and is straightforward. LG is a mainstream brand with good parts availability in the UK; inlet valves, sensors, and control boards are all readily available from suppliers like eSpares, Ransom Spares, and ApplianceSpares. If your dishwasher is 8–10 years old and a professional has diagnosed a failed PCB (control board), the maths shift — a new board can cost £80–£150 for the part alone, plus labour, bringing the total close to the cost of a new budget dishwasher. As a rule of thumb: if the repair cost exceeds 50% of the cost of a comparable new machine, replacement is worth serious consideration. New LG dishwashers start at around £400–£500 in the UK, so a repair bill under £200 is generally good value. If the machine is under 5 years old and still within its guarantee period, check your warranty first — LG offers a standard 2-year manufacturer’s warranty, and some retailers offer extended cover.