Tumble Dryer
F17
The F17 error code on a Bosch tumble dryer signals a problem with the door lock mechanism — the machine has detected that the door is either not closing properly or the lock itself has failed. It’s a moderately serious fault that will prevent your dryer from starting, but in many cases it’s fixable at home without calling an engineer.
What does this error mean?
The F17 code means the dryer’s control board is not receiving a signal that the door is securely closed and locked. Bosch tumble dryers rely on a door interlock switch to confirm the door is shut before allowing a cycle to begin — this is a safety feature. When that signal is missing or intermittent, the machine throws F17 and refuses to run.
Est. repair cost
£8–£35 DIY (latch, hinge, or seal parts) or £80–£150 for a professional repair including call-out and labour
🔍 Likely causes
🛠️ Step-by-step fix
Reset the machine: unplug the dryer, wait 5 minutes, plug it back in and try to start a cycle. A temporary electronic glitch can trigger F17 and a reset clears it.
Inspect the door latch and striker plate: open the door and look at the plastic latch on the door and the metal striker on the cabinet. If the latch is cracked, chipped, or loose, this is your culprit — replacement latches cost £8–£20 from Bosch parts suppliers or sites like eSpares.
Check the door hinges: with the door open, gently lift it. If there’s noticeable movement or the door sags, the hinge pins are worn. Replacement hinges cost around £10–£25 and can be swapped with a screwdriver.
Clean around the door seal: a build-up of fluff or a deformed door seal can stop the door sitting flush. Wipe the seal and door rim clean with a damp cloth. If the seal is torn or compressed, replace it — seals cost £15–£35.
Test the door interlock switch: if the latch and hinges look fine, the interlock switch is the next suspect. This requires removing the inner door panel (around 4–6 screws). If you’re comfortable with basic appliance disassembly, the switch can be tested with a multimeter for continuity and replaced for £10–£25. If you’re unsure about working with internal electrical components, stop here and call a professional.
Do not attempt to repair or bypass the wiring harness or control board yourself — these require a qualified appliance engineer.
📞 When to call a professional
If replacing the door latch, hinge, or seal hasn’t resolved the F17 code, or if the fault lies with the door interlock wiring or control board, call a qualified appliance engineer. Tell them: ‘My Bosch tumble dryer is showing error code F17 — I’ve checked the door latch and seal but the fault persists, so I suspect the door interlock switch or wiring.’ Most engineers can diagnose and repair this in a single visit.
⚖️ Repair or replace?
A professional repair for an F17 fault typically costs £80–£150 including call-out, parts, and labour. If your dryer is under 5 years old, repair is almost always the right call. If it’s over 8 years old and repair costs exceed £120, weigh that against a new mid-range condenser dryer at £300–£450 — at that point, replacing may offer better long-term value.