Baumatic E8 fault codewhat it means and how to fix it
Heating fault — or blocked filters. Baumatic give two quite different causes for one code, and one of them is free.
Take care
What E8 means
The Candy-built Baumatic manuals word E8 in a way that catches people out: the water heating element is not working correctly or the filter plate is clogged. Two causes, one code, and an enormous gap between them in what they cost. The remedy leads with the cheap one — clean the filter plate, and if the problem persists, contact the Customer Care Department. Do it in that order. The connection between filters and heating is not obvious but it is real. A dishwasher heats the water it is circulating, and a badly blocked filter restricts that circulation.
When flow past the heater drops far enough, the heater can be working perfectly while the machine still fails to reach temperature within the time the programme allows, because the heat is not being carried away and distributed through the load. So the machine reports a heating problem and the cause is a filter full of food. Every edition lists Ei with the same meaning, so if that is what your display shows, this is your page.
What a genuine heating fault looks like is worth knowing: dishes that come out wet as well as greasy, since dishwashers dry by heating the load and letting the water evaporate off hot china rather than by blowing air at it. One scope note: the pre-2014 Baumatic-built machines have no E8. Their heating code is E3 — a longer heating time, not reaching the required temperature — and the BDF665W manual attaches no cleaning to it, only a call to Baumatic.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| Filters clogged | Named in the code description itself and first in the remedy. Restricted circulation stops the machine reaching temperature. Free to fix. | Common |
| Heating element failed | The other half of the description. Elements fail open circuit and the machine detects the water is not warming. Nothing in the manual has you inspect it; if the filters are clean, this is the service call. | Common |
| Element scaled up | In hard water, limescale insulates the element so it cannot transfer heat into the water even though it is working. | Occasional |
| Temperature sensor faulty | The machine losing its reference for how hot the water is and reporting a heating problem that is really a measurement problem. | Occasional |
What to try yourself
Switch the machine off at the wall before working inside the cabinet.
Take out the lower basket and remove the filter unit by turning its handle anticlockwise, then lift out the central container and the flat gauze filter beneath it.
Wash the whole unit under a jet of water, using a small brush on anything greasy, as the manual describes. Rinsing the assembly as one piece does not clean it.
In a hard water area, check the salt container is topped up and the softener is set for your water — the manual leaves it at level 4 from the factory. Scale on the heater is the slow version of this fault.
Screw the filter back in clockwise until it seats, restore power and run a hot programme with the machine empty. If the dishes come out hot and dry afterwards, the filters were the problem.
Get a qualified appliance engineer to look at your Baumatic E8
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified appliance engineer, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What it costs to fix
Typical repair cost
£0–£200
Time on site
40 minutes
Free if it is the filters. A replacement heating element is typically £100 to £190 fitted, which is why the manual has you try the filters first.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related Baumatic fault codes
- E3Get it checkedCannot drain. Baumatic name the siphon specifically, which points at the plumbing under your sink rather than the machine.Related: same brand
- E2Get it checkedNo water reaching the machine. Baumatic’s Candy-built models word it three ways across editions — kinked hose, closed hose, "does not fill" — and the checks are the same.Related: same brand
- E4Stop — call an engineerWater leak. Baumatic’s published fix for this code is to check the drain hose — but the instruction they should have given is elsewhere in the same manual.Related: same brand
- E5Get it checkedA control electronics fault on the Candy-era machines. On a Baumatic built before 2014 the same E6 and E7 are thermistor faults, which is a far smaller bill.Related: same brand
Own a Baumatic dishwasher? Save it and its codes come first next time.
Related guides
Common questions about Baumatic E8
How can blocked filters cause a heating fault?
Because the machine heats the water it is circulating. A badly blocked filter restricts that circulation, so heat is not carried away from the element and distributed through the load, and the machine fails to reach temperature within the programme time. The element can be perfectly healthy.
I have Ei rather than E8.
Same code as far as the manuals are concerned. Every edition publishes E8 and Ei together with the identical description.
How do I know if it is genuinely the element?
Clean the filters properly first — properly meaning taken apart, not rinsed whole. If the fault returns after that, it points at the element or its control, and that is a service call. The manual has no step for inspecting the heater.
My older Baumatic never shows E8. What is its heating code?
On the pre-2014 Baumatic-built machines it is E3 — the BDF665W manual gives it as a longer heating time, not reaching the required temperature, caused by a fault in the temperature sensor or heating element, and says to call Baumatic. E6 and E7 on those machines are the thermistor open and short circuit.
The dishes come out wet. Related?
Almost certainly the same problem. Dishwashers dry by heating the load so residual water evaporates off hot surfaces rather than by blowing air. No heat means no drying, and wet crockery is often the first thing people notice.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.