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Thermostats / Sensors

Thermostats / Sensors

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    Lochinvar & A.O. Smith 100233264 BULBWELL FOR THERMOSTAT

    Lochinvar & A.O. Smith

    MSRP: $54.05
    Now: $41.77
    Lochinvar & A.O. Smith 100233264 BULBWELL FOR THERMOSTAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $54.05
    Now: $41.77
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    Liebert E-3080S THERMOSTAT 20/90F SPDT NO CVR

    Liebert

    MSRP: $240.67
    Now: $185.97
    Liebert E-3080S THERMOSTAT 20/90F SPDT NO CVR FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $240.67
    Now: $185.97
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    Lennox 17A30 iHARMONY ZONE THERMOSTAT

    Lennox

    MSRP: $730.82
    Now: $564.72
    Lennox 17A30 iHARMONY ZONE THERMOSTAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $730.82
    Now: $564.72
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    Lennox 78M26 THERMOSTAT SPST CLOSE 74F

    Lennox

    MSRP: $82.76
    Now: $63.95
    Lennox 78M26 THERMOSTAT SPST CLOSE 74F FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $82.76
    Now: $63.95
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    Lennox 56M62 Thermostat Open70F Close50F

    Lennox

    MSRP: $40.71
    Now: $31.45
    Lennox 56M62 Thermostat Open70F Close50F FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $40.71
    Now: $31.45
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    Lennox 24K41 CommProgStat 4ht/3cl

    Lennox

    MSRP: $602.91
    Now: $465.88
    Lennox 24K41 CommProgStat 4ht/3cl FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $602.91
    Now: $465.88
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    Lennox X6249 1F80 DualPwr ProgTSTAT

    Lennox

    MSRP: $101.36
    Now: $78.32
    Lennox X6249 1F80 DualPwr ProgTSTAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $101.36
    Now: $78.32
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    Lennox 14B54 HEAT PUMP T-STAT

    Lennox

    MSRP: $20.53
    Now: $15.86
    Lennox 14B54 HEAT PUMP T-STAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $20.53
    Now: $15.86
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    Lennox 10Z23 Cold Control Thermostat

    Lennox

    MSRP: $665.28
    Now: $514.08
    Lennox 10Z23 Cold Control Thermostat FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $665.28
    Now: $514.08
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    Lennox 39P21 ThermostatatGuardLargeClear

    Lennox

    MSRP: $64.68
    Now: $49.98
    Lennox 39P21 ThermostatatGuardLargeClear FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $64.68
    Now: $49.98
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    Lennox 24Z14 1H/1C UNIVERSAL PROGR TSTAT

    Lennox

    MSRP: $88.49
    Now: $68.38
    Lennox 24Z14 1H/1C UNIVERSAL PROGR TSTAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $88.49
    Now: $68.38
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    Lennox 11Y05 COMMERCIAL THERMOSTAT

    Lennox

    MSRP: $293.14
    Now: $226.52
    Lennox 11Y05 COMMERCIAL THERMOSTAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $293.14
    Now: $226.52
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    Kele Product AIS-24A 24VAC ALARM IND/SILENCE STAT

    Kele Product

    MSRP: $282.97
    Now: $218.66
    Kele Product AIS-24A 24VAC ALARM IND/SILENCE STAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $282.97
    Now: $218.66
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    Kele Product RTC-2P 24V PROPORTIONAL THERMOSTAT

    Kele Product

    MSRP: $524.32
    Now: $397.21
    Kele Product RTC-2P 24V PROPORTIONAL THERMOSTAT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $524.32
    Now: $397.21
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    MSRP: $524.32
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    Kele Product ST-S3E-XME EXECUTIVE WALL STAT 10K

    Kele Product

    MSRP: $58.21
    Now: $44.98
    Kele Product ST-S3E-XME EXECUTIVE WALL STAT 10K FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $58.21
    Now: $44.98
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    Johnson Controls VA-907X-609 TSTAT/HEATER KIT FOR VA ACTS.

    Johnson Controls

    MSRP: $214.48
    Now: $162.49
    Johnson Controls VA-907X-609 TSTAT/HEATER KIT FOR VA ACTS. FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $214.48
    Now: $162.49
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    Johnson Controls GRD10A-608 PLASTIC STAT GUARD,W/BASE&RING

    Johnson Controls

    MSRP: $148.35
    Now: $114.64
    Johnson Controls GRD10A-608 PLASTIC STAT GUARD,W/BASE&RING FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $148.35
    Now: $114.64
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    Johnson Controls T9100 2CL/4HT Wifi Thermostat

    Johnson Controls

    MSRP: $583.65
    Now: $451.01
    Johnson Controls T9100 2CL/4HT Wifi Thermostat FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $583.65
    Now: $451.01
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    Johnson Controls TEC3622-16-000 TSTAT MSTP/N2 0-10VDC WHT

    Johnson Controls

    MSRP: $773.67
    Now: $597.83
    Johnson Controls TEC3622-16-000 TSTAT MSTP/N2 0-10VDC WHT FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $773.67
    Now: $597.83
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    Johnson Controls T-4506-9007 TSTAT,DA/DA,HORIZ,12/30C

    Johnson Controls

    MSRP: $329.98
    Now: $249.99
    Johnson Controls T-4506-9007 TSTAT,DA/DA,HORIZ,12/30C FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order Requirements unless noted above
    MSRP: $329.98
    Now: $249.99
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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.