Tumble Dryer
F07
The F07 error code on a Siemens tumble dryer indicates a heating fault — specifically a problem with the heater circuit or NTC temperature sensor. It’s a moderately serious fault that will stop your dryer from generating heat, but it’s often fixable without an engineer.
What does this error mean?
F07 signals that the dryer’s control board has detected an abnormal reading from the heating system — either the heater isn’t reaching the correct temperature, or the NTC sensor (the thermistor that monitors internal temperature) is sending an out-of-range signal. In some cases, the machine is protecting itself from overheating due to restricted airflow. The drum may still turn, but the appliance won’t dry clothes properly because no heat is being produced.
Est. repair cost
£80–£160 professional repair; £10–£20 DIY NTC sensor replacement; £25–£100 DIY heating element (part only)
🔍 Likely causes
🛠️ Step-by-step fix
Clean the fluff filter thoroughly — remove it from the door opening, pull apart both layers, and rinse under warm water. Allow to dry completely before reinserting. This alone clears F07 in many cases.
On condenser models, remove and clean the condenser unit — it’s usually located behind a panel at the bottom front. Rinse it under a tap until the water runs clear, leave to dry, then refit it securely.
Check the exhaust duct on vented models — disconnect the hose from the back and inspect for blockages, kinks, or a bird guard clogged with fluff. Clear any obstruction and ensure the hose run is as short and straight as possible.
Reset the machine — once filters and ducts are clear, turn the dryer off at the mains, wait 10 minutes, then switch it back on and restart a cycle. A cleared blockage will often allow the TOC to reset automatically.
Test the NTC sensor with a multimeter if you’re comfortable doing so — disconnect the dryer from the mains, locate the sensor (a small two-wire component clipped near the heater housing), and check resistance. At room temperature it should read approximately 10kΩ. A wildly different reading points to a faulty sensor (replacement part typically £10–£20).
If the error persists after all of the above, stop DIY work — the heating element, thermal cut-out, or control board will need professional diagnosis, as these involve live electrical components inside the machine.
📞 When to call a professional
Call an appliance engineer if the F07 fault returns after cleaning all filters and ducts, or if you’ve confirmed the NTC sensor reads correctly but the fault persists. Tell the engineer you have a Siemens tumble dryer showing F07, that you’ve ruled out airflow blockages, and that you suspect the heating element, thermal cut-out, or control board. Avoid opening the heater housing yourself — mains-voltage components inside carry a serious risk of electric shock.
⚖️ Repair or replace?
A professional repair for F07 — typically replacing a heating element (£60–£100 for the part) or NTC sensor — will cost £80–£160 all-in with labour in the UK. If your Siemens dryer is under 5 years old, repair is almost always worth it; Siemens machines are built to last 10–15 years. If it’s over 8–10 years old and the control board is implicated (£80–£150 for the part alone), weigh the total repair cost against a new mid-range condenser dryer at £350–£550 — replacement may make more financial sense.