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Thermostats / Sensors

Thermostats / Sensors

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    Lennox 17W11 Defrost Thermostat

    Lennox

    MSRP: $34.55
    Now: $26.70
    Defrost Thermostat   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $34.55
    Now: $26.70
    Qty in Cart: 0
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    MSRP: $34.55
    Now: $26.70
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    Lennox 17M50 Humidity Sensor

    Lennox

    MSRP: $411.64
    Now: $318.09
    Humidity Sensor   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $411.64
    Now: $318.09
    Qty in Cart: 0
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    MSRP: $411.64
    Now: $318.09
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    Lennox 17J56 Flame Sensor

    Lennox

    MSRP: $22.51
    Now: $17.39
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $22.51
    Now: $17.39
    Qty in Cart: 0
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    MSRP: $22.51
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    Lennox 14W86 Defrost Thermostat

    Lennox

    MSRP: $49.85
    Now: $38.52
    Defrost Thermostat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $49.85
    Now: $38.52
    Qty in Cart: 0
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    MSRP: $49.85
    Now: $38.52
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    Lennox 14K92 OutdoorTemperature Sensor

    Lennox

    MSRP: $27.74
    Now: $21.43
    OutdoorTemperature Sensor  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $27.74
    Now: $21.43
    Qty in Cart: 0
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    MSRP: $27.74
    Now: $21.43
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    Lennox 14B53 Ambient Temperature Sensor

    Lennox

    MSRP: $74.68
    Now: $56.58
    Ambient Temperature Sensor  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $74.68
    Now: $56.58
    Qty in Cart: 0
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    MSRP: $74.68
    Now: $56.58
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    Lennox 13H27 Electrode/Sensor

    Lennox

    MSRP: $49.45
    Now: $38.21
    Electrode/Sensor  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $49.45
    Now: $38.21
    Qty in Cart: 0
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    MSRP: $49.45
    Now: $38.21
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    Lennox 11M65 Flame Sensor LEAD

    Lennox

    MSRP: $36.33
    Now: $28.08
    Flame Sensor LEAD   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $36.33
    Now: $28.08
    Qty in Cart: 0
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    MSRP: $36.33
    Now: $28.08
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    Carrier VST2900SCH 3H/2C Programmable School Thermostat

    Venstar

    MSRP: $240.11
    Now: $185.54
    3H/2C Programmable School Thermostat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $240.11
    Now: $185.54
    Qty in Cart: 0
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    MSRP: $240.11
    Now: $185.54
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    Carrier VST2700 Venstar 2H/2C Non-ProgDigTstat

    Venstar

    MSRP: $179.40
    Now: $138.63
    Venstar 2H/2C Non-ProgDigTstat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $179.40
    Now: $138.63
    Qty in Cart: 0
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    MSRP: $179.40
    Now: $138.63
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    Carrier VST2300FS Venstar 7-day 2H/2C Programmable Thermostat

    Venstar

    MSRP: $192.37
    Now: $148.65
    Venstar 7-day 2H/2C Programmable Thermostat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $192.37
    Now: $148.65
    Qty in Cart: 0
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    MSRP: $192.37
    Now: $148.65
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    Carrier VST1100FS 2H/2C Heat Pump 7-day Programmable Thermostat

    Venstar

    MSRP: $213.99
    Now: $165.35
    2H/2C Heat Pump 7-day Programmable Thermostat   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $213.99
    Now: $165.35
    Qty in Cart: 0
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    MSRP: $213.99
    Now: $165.35
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    Carrier VST1075 24V 7day Prog. Fan Coil Thermostat

    Venstar

    MSRP: $109.35
    Now: $84.49
    24V 7day Prog. Fan Coil Thermostat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $109.35
    Now: $84.49
    Qty in Cart: 0
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    MSRP: $109.35
    Now: $84.49
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    Carrier VST1000FS Venstar 1 day Programm Thermostat

    Venstar

    MSRP: $153.55
    Now: $118.65
    Venstar 1 day Programm Thermostat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $153.55
    Now: $118.65
    Qty in Cart: 0
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    MSRP: $153.55
    Now: $118.65
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    Carrier VST0130 Venstar Thermostat Non- Programmable 1H/1C

    Carrier

    MSRP: $55.84
    Now: $42.30
    Venstar Thermostat Non- Programmable 1H/1C  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $55.84
    Now: $42.30
    Qty in Cart: 0
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    MSRP: $55.84
    Now: $42.30
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    Carrier TSTATXXSEN01B Outdoor Temperature Sensor

    Carrier

    MSRP: $41.63
    Now: $32.17
    Outdoor Temperature Sensor   FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $41.63
    Now: $32.17
    Qty in Cart: 0
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    MSRP: $41.63
    Now: $32.17
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    Carrier TBPAC Thermostat

    Carrier

    MSRP: $280.25
    Now: $216.56
    Thermostat  FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $280.25
    Now: $216.56
    Qty in Cart: 0
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    MSRP: $280.25
    Now: $216.56
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    Carrier SYSTXCCRRS01 Infinity Remote Room Temperature Sensor

    Carrier

    MSRP: $212.06
    Now: $163.86
    Carrier SYSTXCCRRS01  Infinity Remote Room Temperature Sensor Item is Non Cancelable / Non Returnable FurnacePartSource.com Commitment Item Typically Ships within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $212.06
    Now: $163.86
    Qty in Cart: 0
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    MSRP: $212.06
    Now: $163.86
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    Carrier LH33WZ520 Flame Sensor

    Carrier

    MSRP: $21.42
    Now: $16.55
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $21.42
    Now: $16.55
    Qty in Cart: 0
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    MSRP: $21.42
    Now: $16.55
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    Carrier LH33WZ518 Flame Sensor

    Carrier

    MSRP: $26.25
    Now: $20.29
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $26.25
    Now: $20.29
    Qty in Cart: 0
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    MSRP: $26.25
    Now: $20.29
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Adding your products to cart

Thermostats and Sensors for HVAC Systems 

HVAC thermostats and furnace sensors are essential for regulating system performance, energy efficiency, and safety. These components monitor conditions such as temperature, pressure, and flame status, ensuring furnaces, air conditioners, and heat pumps operate correctly. Furnace Part Source offers a wide range of OEM furnace sensors and thermostats for both residential and commercial applications. 

Types of HVAC Thermostats 

  • Non-Programmable Thermostats – Manual models that maintain a set temperature until adjusted.
  • Programmable Thermostats – Digital controls with scheduling features to reduce energy usage during off
  • Smart Thermostats – Wi-Fi connected, app-enabled devices with advanced features like occupancy detection and zoning compatibility. 

Compatibility and Replacement 

Selecting the correct OEM thermostat or sensor ensures accurate readings and reliable operation. Always verify part numbers, voltage requirements, and system configuration (single-stage, multi-stage, or heat pump) before replacing components. 

Maintenance and Upgrades 

Faulty sensors can cause misreadings, wasted energy, or system shutdowns. Replacing worn parts or upgrading to energy-efficient thermostats restores system reliability, reduces utility costs, and extends equipment life. 

Wide Selection from Furnace Part Source 

With access to over 500,000 parts from 300+ manufacturers, Furnace Part Source provides the right solution for any repair or upgrade. From thermistors to programmable thermostats, our catalog includes components designed for both residential and commercial HVAC systems. 

Frequently Asked Questions 

What types of thermostats are available for HVAC systems? 

Options include non-programmable, programmable, and smart thermostats, each offering different levels of control and energy efficiency. 

How do I know if my furnace sensor needs replacement?

Signs include frequent system shutdowns, inaccurate temperature readings, or ignition failures.  

Why should I use OEM furnace sensors? 

OEM parts ensure proper fit, compatibility, and performance, reducing the risk of system malfunctions.

What is the difference between a thermocouple and a flame sensor? 

Thermocouples generate voltage to detect a pilot flame, while modern flame sensors use electronic signals to confirm burner ignition. 

Can upgrading to a smart thermostat improve efficiency?

Yes. Smart thermostats allow remote control, scheduling, and advanced optimization, often reducing energy costs.