Dishwasher
E3
The E3 error code on a Miele dishwasher indicates a water heating fault — the appliance is not reaching the required temperature within the expected time. It’s a moderately serious error that will stop your dishwasher completing a cycle, but in many cases it’s fixable at home.
What does this error mean?
Miele dishwashers monitor water temperature throughout each wash programme. The E3 code is triggered when the water fails to heat to the correct temperature within a set time limit, pointing to a fault in the heating circuit. This could mean the heating element itself has failed, or there’s a problem with the thermostat or NTC temperature sensor that feeds data to the control board.
Est. repair cost
£80–£160 professional repair; £30–£70 DIY heating element part only
🔍 Likely causes
🛠️ Step-by-step fix
Reset the dishwasher: Switch it off at the wall socket, wait 30 seconds, then power it back on and run a short cycle to see if the error clears — an occasional sensor glitch can trigger E3 falsely.
Run a hot rinse or descale programme: If your machine has a built-in descale cycle, run it using a Miele-approved descaler (or a supermarket equivalent rated for dishwashers, around £3–£6). Heavy limescale on the element is a common culprit and this step costs nothing beyond the product.
Check and clean the filter assembly: A blocked filter can restrict water flow, causing the element to overheat and cut out. Remove the base filter, rinse it under the tap, and refit it firmly before running another cycle.
Check your home’s hot water supply: Ensure the cold water inlet valve under your sink is fully open. Restricted water flow can prevent the drum from filling properly, causing the element to run dry.
Inspect the heating element for visible damage (only if comfortable doing so): Remove the lower basket and spray arm and look into the base of the tub. A visibly corroded, cracked, or scaled-up element confirms the part needs replacing. Replacement Miele heating elements cost approximately £30–£70 online — only attempt fitting if you are confident working with appliances and have isolated the power.
If the error persists after the above steps, stop DIY attempts: A faulty NTC sensor, thermostat, or control board requires a qualified appliance engineer with diagnostic tools to confirm and repair safely.
📞 When to call a professional
If the error returns after a reset, descale, and filter clean, call a Miele-approved or independent appliance engineer. Tell them you have an E3 fault code and that you’ve already reset the machine and ruled out limescale — this saves diagnostic time. You should also call immediately if you notice any burning smell, scorching around the element area, or the machine trips your household electrics.
⚖️ Repair or replace?
A professional repair for an E3 fault (typically a heating element or NTC sensor replacement) costs around £80–£160 including parts and labour in the UK. Miele dishwashers are built to last 15–20 years, so if your machine is under 10 years old, repair is almost always the better value. If it’s over 12 years old and the control board is also implicated, replacement becomes worth considering — a comparable new Miele dishwasher starts at around £700–£900.