Miele F158 fault codewhat it means and how to fix it
The appliance has overheated. Miele give no owner remedy for this at all — not even cleaning the filters — and for them that silence is deliberate.
Stop — this needs an engineer
Get a qualified appliance engineer to look at your Miele F158
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What F158 means
Miele’s published cause is four words: "The appliance has overheated." Their instruction is the standard one they attach to technical faults: this is something you cannot remedy yourself, and you should book a repair appointment. What makes it worth a page is what is missing. Miele are unusually generous with owner remedies — they will tell you to clean a filter, spin your washing faster, reduce a load, wipe a contact, even switch the machine off and on again to work around a software bug they admit to.
On overheating they offer nothing. There is no suggestion to clean the filters and try again, which is the obvious first thought and is exactly what most manufacturers say in this situation. For a brand this forthcoming elsewhere, withholding a remedy is a signal rather than an oversight.
Read it as Miele saying an overheat event on their machine is not something to clear and carry on from. That fits how this category works: a dryer overheating means heat has built somewhere it should not, in a cabinet that also contains fine dry lint, and the safety thermostats that intervened have done so because the normal controls did not. Whether the underlying cause was airflow or a control failure, someone should establish which before it runs again.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| Restricted airflow allowing heat to build | The commonest underlying reason on any dryer — filters, the plinth filter, the heat exchanger. Note that Miele still do not offer cleaning as a remedy here, which suggests they want the event investigated rather than cleared. | Common |
| A failed thermostat or temperature sensor | If the control thermostat has failed, heating continues past the intended temperature until a safety device intervenes. The machine reaching that point is the fault being reported. | Occasional |
| A heating circuit that has failed on | A relay welded closed keeps supplying heat regardless of what the control asks for. This produces a genuine overheat rather than a misreported one, and it will recur. | Occasional |
| A control electronics fault | The board managing the heating cycle behaving incorrectly. Miele have a large number of separate codes for electronic module faults, which suggests they distinguish this from a plain overheat where they can. | Rare |
Can you fix it yourself?
Stop — this needs an engineer
What it costs to fix
Typical repair cost
£120–£350
A thermostat or sensor is at the cheaper end and control electronics at the expensive one, with a diagnostic visit on top. Miele parts and labour are at the premium end of the market, so on an older machine it is worth asking for the diagnosis before authorising the repair.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
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Related Miele fault codes
- F66Get it checkedThe airflow fault, and the code most often described wrongly elsewhere. Miele publish eight causes and seven of them are yours to fix — including a filter that is simply worn out.Related: same brand
- F55Get it checkedThe machine gave up after three hours with the washing still damp. Miele name a cause most people would not think of: the spin speed on your washing machine.Related: same brand
- F50Get it checkedThree quite different things share this number, and one of them is a software glitch that appears about a minute after you open the door to add something.Related: same brand
- F252Usually simple to fixDirty contacts in the door hinge area. One of the very few Miele codes with a genuine owner fix, and it takes a cloth.Related: same brand
Own a Miele tumble dryer? Save it and its codes come first next time.
Related guides
Common questions about Miele F158
Can I just clean the filters and run it again?
Cleaning the filters is always worth doing. But note that Miele — who recommend filter cleaning as a remedy on several other codes, in detail — pointedly do not offer it here. They classify this as a technical fault you cannot remedy yourself, with no owner step at all, and we would take that at face value on a code about overheating.
Is it safe to leave plugged in?
The machine has stopped and is not heating, so it is not doing anything while it sits there. We would still switch it off at the wall rather than leave it live, and we would certainly not run another cycle to see whether it recurs.
Why is this rated more seriously than Miele rate it?
Miele rate every one of their service-only codes the same way, with one sentence, whether it is an overheat or a model type not being programmed correctly. We separate them by consequence. Overheating in a cabinet containing dry lint is the mechanism behind tumble dryer fires, so it sits in a different category from a configuration error.
What are the related codes?
Miele publish a family of temperature sensor faults around the refrigerant circuit — F1 and F2 at the refrigerant sensor, F156 and F157 downstream of the condenser, F206 and F207 downstream of the compressor, and F159 for a compressor start-up fault. All are service-only. If you have one of those rather than F158, the machine has detected a sensor problem rather than an actual overheat.
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 support portal
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.