Miele Dryer Thermostat Replacement Guide

Miele stacks four layers of temperature control so the dryer holds precise heat and stays safe even if the board misbehaves. Three of them are protective; one is the board's everyday sensor.

The Four Temperature Parts#

Cycling thermostat. The everyday control. It opens when the air reaches the upper limit to cut the heater, then closes as things cool, giving coarse temperature regulation on its own, independent of the board.

High-limit thermostat. A resettable safety that opens around 250°F, well above normal running temperature, and closes again once it cools. It catches sustained overheating from a stuck cycling thermostat.

Thermal fuse. A one-shot device that opens the heater circuit for good at roughly 300°F and never resets — it is the last line of defense against a heating-system failure, and once it goes it must be replaced.

NTC temperature sensor. The board's own input: a variable-resistance probe that feeds continuous temperature readings for precise digital program control.

Match the Symptom#

• Thermal fuse blown — no heat at all, drum turning normally; this is the single most common no-heat fault
• Cycling thermostat stuck open — also no heat, but unlike the fuse it can be tested for continuity at room temperature
• Cycling thermostat stuck closed — the opposite problem: overheating, clothes scorching hot, and the high-limit tripping again and again
• High-limit tripping repeatedly — rarely the part's own fault; look for restricted airflow or a stuck cycling thermostat behind it
• NTC sensor failed — the board loses its reading and either defaults to maximum heat or shuts down with a temperature error

Testing and Replacing#

All four sit at the rear of the machine on or near the heating-element housing.

1. Disconnect at the breaker.
2. Remove the rear panel with a Torx Plus T20 driver — standard Torx will slip and strip these heads.
3. Find the small disc- or cylinder-shaped parts, each with two wire terminals, on the element housing.
4. Meter the suspect part: continuity at room temperature is normal for the fuse, high-limit, and a closed cycling thermostat; an open reading means it has failed.
5. Note the wire positions, pull them, remove the mounting screw or clip, and fit the new part in the same spot.
6. Reconnect, reassemble, and test.

The NTC sensor may live in the exhaust duct rather than on the housing — follow its wire from the board to find it. Tools are just a Torx Plus T20 driver and a multimeter.

Do Not Just Replace a Blown Fuse#

A thermal fuse does not fail on its own — it blows because something let the dryer overheat. If yours keeps blowing, chase the cause before fitting another: a lint-choked filter, a restricted exhaust duct, a stuck cycling thermostat, or a jammed heater relay. Replacing the fuse without fixing that just buys you a few loads before the next one goes, which is why a repeatedly blowing fuse is a good moment to call in a professional.

Lifespans and Prevention#

These parts are long-lived: the cycling thermostat and NTC sensor typically run 15 to 20 years, the high-limit often 20 or more since it rarely trips without an upstream fault, and the thermal fuse lasts indefinitely unless something triggers it. The best prevention is airflow — clean the lint filter before every load and have the exhaust duct cleared every 2 to 3 years, since restricted airflow is what drives the overheating that trips the safety parts in the first place. When you do need a part, note that Miele is OEM-only, so parts run around 30–50% more than mass-market equivalents, with no aftermarket substitutes, and a Torx Plus T15 or T20 driver is required so you do not strip the fasteners.