What this error means
Heating fault — the dishwasher is not reaching the correct wash temperature
The E03 error means the dishwasher has failed to heat the water to the required temperature within the allowed time, or the temperature sensor has returned an out-of-range reading. The most common causes are a failed heating element, a faulty NTC thermistor, or heavy limescale insulating the element. A wiring fault to either component can also produce this code.
What you'll need first
Add all tools to Amazon basket →Affiliate links — we may earn a small commission at no extra cost to you.
Step-by-step
Symptoms to look for
- Dishes coming out cold, greasy, or with undissolved detergent after a hot programme
- Interior of the dishwasher feels no warmer than room temperature during a cycle
- E03 displayed partway through a wash or rinse programme
- Programme runs significantly longer than the displayed time before faulting
Diagnostic steps
Unplug for 5 minutes to reset the board. Run the hottest programme — Intensive or 70 degrees — with no load. After 15 minutes, carefully open the door a few centimetres. You should feel warm to hot steam immediately. If the interior feels no warmer than room temperature the element is not heating.
Add a proprietary dishwasher descaler or two tablespoons of citric acid to the base of the tub and run a full 65-degree empty cycle. Limescale insulates the element — it draws full power but transfers very little heat.
Open the salt cap on the floor of the tub. If empty or very low, top up with coarse dishwasher salt — not table salt.
With the dishwasher completely unplugged, remove the lower basket. The element is the metal bar or ring running across the base of the tub. Inspect for cracks, orange corrosion patches, or burnt sections.
With the dishwasher unplugged, remove the lower kickplate panel. Disconnect both wiring terminals from the element and test across them with a multimeter. A healthy Beko dishwasher element reads between 20 and 30 ohms. Zero or OL means the element has failed.
The NTC sensor is near the sump or tub base, connected by two thin wires. Disconnect its connector and test across the terminals. At room temperature a healthy Beko dishwasher NTC reads between 4,000 and 12,000 ohms. Zero or OL means the sensor has failed.
When to call an engineer
- Heating element reads outside 20 to 30 ohms or shows continuity to earth — must be replaced
- NTC thermistor reads open circuit or zero ohms on a multimeter
- Element tests within normal range but E03 persists — wiring or control board fault
- Visible corrosion, cracking, or burnt sections on the element in the tub base
Frequently asked questions
Can limescale alone cause E03 without the element being broken?
How do I tell whether it is the element or the thermistor?
Are dishes safe after a cycle that triggered E03?
What should the NTC read at room temperature on a Beko dishwasher?
🎯 What is likely causing this fault?
⚠️ Estimates based on common faults — not a guaranteed diagnosis. Always verify before ordering parts.
Parts you may need
Enter your model number to filter results to your exact machine
Usually found on a label inside the door frame or on the back panel of the machine.
| Part | Approx. UK Cost | Find it |
|---|---|---|
| Heating element | £20 - £30 | 🛒 Amazon UK → |
| Heating element | £15 - £20 | 🏷️ eBay UK → |
| NTC Thermistor | £10 - £12 | 🛒 Amazon UK → |
| NTC Thermistor | £10 - £12 | 🏷️ eBay UK → |
ℹ️ Prices are approximate. Always check the part number matches your model before ordering. Not sure of your model number? Find out how to locate it here.