🔑 Resetting a Yale YDM4109+ Digital Lock

I just bought a resale flat and inherited a Yale YDM4109+ digital lock. The previous owner didn’t reset it and simply told me to “go YouTube.” I tried YouTube and even ChatGPT guides, but nothing worked — the lock kept flashing “lock closed.”

Finally, I reached out to Yale Singapore WhatsApp (+65 8138 5338) and their after-sales service was excellent. Jeson guided me patiently step by step — much clearer than trying to figure it out myself. Really appreciate the support. 🙏

📞 Yale Singapore After-sales Support

• WhatsApp: +65 8138 5338

• Hotline: +65 6591 8868 (8:00 AM – 8:00 PM, Mon–Sun, including Public Holidays)

• Emergency (after 8:00 PM): +65 8179 9817

• Website: www.yalehome.com/sg/en

✅ What I learned:

• Always reset your lock when you buy resale — old owners’ PINs/fingerprints/cards may still work.

• The Master PIN is for admin access; user codes/fingerprints/cards must be deleted separately.

• Use menu option 5 to delete all old credentials before re-registering.

• If reset fails, Yale can arrange a technician (service fee applies).

👉 Lesson: Don’t rely only on YouTube or the seller — just contact Yale support directly. Their WhatsApp service is responsive and helpful.