OEM Lennox ComfortSense 7500 Programmable Thermostat — 17G74
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The genuine OEM Lennox 17G74 ComfortSense CS7500 is a programmable thermostat that serves as the central control for your Lennox heating and cooling system. It lets homeowners set flexible schedules for temperature and comfort throughout the day, communicating with the furnace, air conditioner, or heat pump to maintain the desired setpoint while helping manage energy use.
Common failure symptoms: A failing thermostat may show a blank or unresponsive display, lose its programming, fail to call for heating or cooling, or cause the system to short-cycle or run continuously. Inaccurate room-temperature readings and intermittent connection to the equipment are also common signs that the control needs replacement.
Why OEM matters: The Lennox 17G74 is designed to integrate directly with Lennox equipment, ensuring full compatibility with the system's staging, terminal wiring, and control features. Using the factory ComfortSense CS7500 preserves the intended functionality and programming options that a generic thermostat may not fully support, giving you reliable, accurate control of your Lennox comfort system.
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