Lennox 24Z17 Thermostat
The Lennox 24Z17 ComfortSense 3000 is an industrial-grade programmable thermostat engineered for precise climate control in both residential and light commercial HVAC applications. As the direct replacement for Lennox 51M37, this L3532U model is a universal solution capable of managing up to 3 heat / 2 cool stages. Designed for high-reliability environments, it features 5-2 day programming, allowing contractors to customize separate schedules for weekdays and weekends with four distinct time periods per day. The unit is hard-wired to the indoor power supply, eliminating the need for batteries and reducing nuisance service calls. Its large, back-lit LCD provides clear system status icons and accurate digital temperature readings, significantly outperforming legacy mechanical controls. For dual-fuel or heat pump installations, the Lennox 24Z17 supports auxiliary heat lockout and is compatible with an optional outdoor temperature sensor to maximize energy-efficient HVAC control and equipment longevity.
Key Benefits for Professionals- Universal Compatibility: Operates seamlessly with conventional gas/oil/electric systems, heat pumps, and dual-fuel configurations.
- Direct OEM Replacement: Replaces discontinued Lennox 51M37 and L3532H models without requiring wiring modifications.
- Advanced Protection: Integrated five-minute compressor short-cycle protection and overheat safety switches (opening at 93°F) safeguard the condenser and furnace.
- Contractor-Friendly Maintenance: Built-in filter monitor and service alerts keep end-users informed of routine maintenance needs, reducing emergency repairs.
- Non-Volatile Memory: Maintains all programmed schedules for up to 24 hours during total power outages.
Is the Lennox 24Z17 compatible with my existing heat pump?
Yes, the Lennox 24Z17 is a universal multi-stage thermostat designed to control up to 3 heating and 2 cooling stages, making it an ideal fit for most standard and high-efficiency heat pump systems.
Does this unit require batteries for operation?
No, this model is hard-wired directly to the 24VAC indoor unit power supply, ensuring consistent operation without the failure points associated with battery-powered thermostats.
What model does the 24Z17 replace?
The Lennox 24Z17 is the official manufacturer-designated replacement for 51M37 and the older L3532H series, offering the same footprint and wiring terminal designations.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $154.63
-65%$154.63
$54.12Lennox 24Z17 Thermostat
The Lennox 24Z17 ComfortSense 3000 is an industrial-grade programmable thermostat engineered for precise climate control in both residential and light commercial HVAC applications. As the direct replacement for Lennox 51M37, this L3532U model is a universal solution capable of managing up to 3 heat / 2 cool stages. Designed for high-reliability environments, it features 5-2 day programming, allowing contractors to customize separate schedules for weekdays and weekends with four distinct time periods per day. The unit is hard-wired to the indoor power supply, eliminating the need for batteries and reducing nuisance service calls. Its large, back-lit LCD provides clear system status icons and accurate digital temperature readings, significantly outperforming legacy mechanical controls. For dual-fuel or heat pump installations, the Lennox 24Z17 supports auxiliary heat lockout and is compatible with an optional outdoor temperature sensor to maximize energy-efficient HVAC control and equipment longevity.
Key Benefits for Professionals- Universal Compatibility: Operates seamlessly with conventional gas/oil/electric systems, heat pumps, and dual-fuel configurations.
- Direct OEM Replacement: Replaces discontinued Lennox 51M37 and L3532H models without requiring wiring modifications.
- Advanced Protection: Integrated five-minute compressor short-cycle protection and overheat safety switches (opening at 93°F) safeguard the condenser and furnace.
- Contractor-Friendly Maintenance: Built-in filter monitor and service alerts keep end-users informed of routine maintenance needs, reducing emergency repairs.
- Non-Volatile Memory: Maintains all programmed schedules for up to 24 hours during total power outages.
Is the Lennox 24Z17 compatible with my existing heat pump?
Yes, the Lennox 24Z17 is a universal multi-stage thermostat designed to control up to 3 heating and 2 cooling stages, making it an ideal fit for most standard and high-efficiency heat pump systems.
Does this unit require batteries for operation?
No, this model is hard-wired directly to the 24VAC indoor unit power supply, ensuring consistent operation without the failure points associated with battery-powered thermostats.
What model does the 24Z17 replace?
The Lennox 24Z17 is the official manufacturer-designated replacement for 51M37 and the older L3532H series, offering the same footprint and wiring terminal designations.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Lennox 24Z17 ComfortSense 3000 is an industrial-grade programmable thermostat engineered for precise climate control in both residential and light commercial HVAC applications. As the direct replacement for Lennox 51M37, this L3532U model is a universal solution capable of managing up to 3 heat / 2 cool stages. Designed for high-reliability environments, it features 5-2 day programming, allowing contractors to customize separate schedules for weekdays and weekends with four distinct time periods per day. The unit is hard-wired to the indoor power supply, eliminating the need for batteries and reducing nuisance service calls. Its large, back-lit LCD provides clear system status icons and accurate digital temperature readings, significantly outperforming legacy mechanical controls. For dual-fuel or heat pump installations, the Lennox 24Z17 supports auxiliary heat lockout and is compatible with an optional outdoor temperature sensor to maximize energy-efficient HVAC control and equipment longevity.
Key Benefits for Professionals- Universal Compatibility: Operates seamlessly with conventional gas/oil/electric systems, heat pumps, and dual-fuel configurations.
- Direct OEM Replacement: Replaces discontinued Lennox 51M37 and L3532H models without requiring wiring modifications.
- Advanced Protection: Integrated five-minute compressor short-cycle protection and overheat safety switches (opening at 93°F) safeguard the condenser and furnace.
- Contractor-Friendly Maintenance: Built-in filter monitor and service alerts keep end-users informed of routine maintenance needs, reducing emergency repairs.
- Non-Volatile Memory: Maintains all programmed schedules for up to 24 hours during total power outages.
Is the Lennox 24Z17 compatible with my existing heat pump?
Yes, the Lennox 24Z17 is a universal multi-stage thermostat designed to control up to 3 heating and 2 cooling stages, making it an ideal fit for most standard and high-efficiency heat pump systems.
Does this unit require batteries for operation?
No, this model is hard-wired directly to the 24VAC indoor unit power supply, ensuring consistent operation without the failure points associated with battery-powered thermostats.
What model does the 24Z17 replace?
The Lennox 24Z17 is the official manufacturer-designated replacement for 51M37 and the older L3532H series, offering the same footprint and wiring terminal designations.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
