OEM Lennox iComfort S30 Programmable Thermostat — 12U67
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Genuine OEM Lennox 12U67 iComfort S30 programmable thermostat. This smart, Wi-Fi–enabled control manages temperature, scheduling, and system communication for compatible Lennox equipment, delivering precise comfort control and enabling remote access and diagnostics. As an OEM component, it is designed to integrate seamlessly with the iComfort-enabled Lennox platform.
Common failure symptoms: A thermostat in need of replacement may show a blank or unresponsive touchscreen, fail to connect to Wi-Fi or the equipment, lose its schedule and settings, misread room temperature, or intermittently drop communication with the furnace or air handler — resulting in erratic heating and cooling.
Why OEM matters: The iComfort S30 uses Lennox's proprietary communicating protocol, so third-party or generic thermostats can't provide the same integration, diagnostics, or feature set. Installing the genuine Lennox 12U67 ensures full compatibility, proper system communication, and access to the smart features your equipment supports — while keeping your warranty coverage intact. In stock and ships same day before 3PM CST.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days