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Thermostats / Sensors

Thermostats / Sensors

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    International Environmental 71491043 24-277V Horizontal Thermostat

    International Environmental

    MSRP: $259.00
    Now: $200.14
    International Environmental 71491043 24-277V Horizontal 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...
    MSRP: $259.00
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    Trane KIT7831 Outdoor Thermostat Kit

    Trane

    MSRP: $141.57
    Now: $109.39
    Trane KIT7831 Outdoor Thermostat Kit 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: $141.57
    Now: $109.39
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    Lochinvar & A.O. Smith 100110950 Thermostat Lower Probe

    Lochinvar & A.O. Smith

    MSRP: $147.61
    Now: $114.06
    Lochinvar & A.O. Smith 100110950 THERMOSTAT LOWER PROBE 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: $147.61
    Now: $114.06
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    Supco LD120 THERMOSTAT

    Supco

    MSRP: $13.50
    Now: $10.43
    Supco LD120 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: $13.50
    Now: $10.43
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    Peco Controls T8532-001 3H/2C 24V DIGITAL THERMOSTAT

    Peco Controls

    MSRP: $178.53
    Now: $137.95
    Peco Controls T8532-001 3H/2C 24V DIGITAL 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: $178.53
    Now: $137.95
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    Schneider Electric (Barber Colman) AT-1163 WireStatGuard 6.5hx6.62wX3.25d

    Schneider Electric (Barber Colman)

    MSRP: $204.68
    Now: $158.16
    Schneider Electric (Barber Colman) AT-1163 WireStatGuard 6.5hx6.62wX3.25d 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...
    MSRP: $204.68
    Now: $158.16
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    Crandall Stats & Sensors AT-1103-CSS WIRE STAT GUARD 4.25x2.62x1.62

    Crandall Stats & Sensors

    MSRP: $76.28
    Now: $58.94
    Crandall Stats & Sensors AT-1103-CSS WIRE STAT GUARD 4.25x2.62x1.62 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...
    MSRP: $76.28
    Now: $58.94
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    Reznor 197077 UNIT MOUNT KIT FOR TSTAT UDAP

    Reznor

    MSRP: $88.01
    Now: $66.68
    Reznor 197077 UNIT MOUNT KIT FOR TSTAT UDAP 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: $88.01
    Now: $66.68
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    Laars Heating Systems RE2353601 THERMOSTAT NT 150-1700

    Laars Heating Systems

    MSRP: $47.90
    Now: $37.01
    Laars Heating Systems RE2353601 THERMOSTAT NT 150-1700 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: $47.90
    Now: $37.01
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    Hoshizaki 4A2879-02 Thermostat A30-3953

    Hoshizaki

    MSRP: $213.31
    Now: $164.83
    Hoshizaki 4A2879-02 Thermostat A30-3953 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: $213.31
    Now: $164.83
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    Indeeco THE14 Internal Stat Replacement

    Indeeco

    MSRP: $232.62
    Now: $179.75
    Indeeco THE14 Internal Stat Replacement 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: $232.62
    Now: $179.75
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    MSRP: $232.62
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    Robertshaw KA-1119-42 ELECTRIC THERMOSTAT

    Robertshaw

    MSRP: $102.89
    Now: $79.51
    Robertshaw KA-1119-42 ELECTRIC THERMOSTAT Must Ship by Freight Truck  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...
    MSRP: $102.89
    Now: $79.51
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    Amana-Goodman PSP2100 Digital Non-Programmable Tstat

    Amana-Goodman

    MSRP: $120.53
    Now: $93.14
    Amana-Goodman PSP2100 Digital Non-Programmable 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: $120.53
    Now: $93.14
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    Danfoss 087N-1196 THERMOSTAT RMT24

    Danfoss

    MSRP: $94.73
    Now: $73.20
    Danfoss 087N-1196 THERMOSTAT RMT24 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: $94.73
    Now: $73.20
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    Baltimore Aircoil (BAC) 313859 THERMOSTAT

    Baltimore Aircoil (BAC)

    MSRP: $998.25
    Now: $771.38
    Baltimore Aircoil (BAC) 313859 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: $998.25
    Now: $771.38
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    MSRP: $998.25
    Now: $771.38
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    Danfoss 077B0020 -4.5/-11.8deg C Thermostat

    Danfoss

    MSRP: $63.69
    Now: $49.22
    Danfoss 077B0020 -4.5/-11.8deg C 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: $63.69
    Now: $49.22
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    System Sensor B114LPBT SSD SERIES100 24VAC/DC BASE

    System Sensor

    MSRP: $120.50
    Now: $91.29
    System Sensor B114LPBT SSD SERIES100 24VAC/DC BASE 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: $120.50
    Now: $91.29
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    Rheem-Ruud SP310020 110/170f SPST Thermostat

    Rheem-Ruud

    MSRP: $16.37
    Now: $12.65
    Rheem-Ruud SP310020 110/170f SPST 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: $16.37
    Now: $12.65
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    Johnson Controls T-4002-9009 TSTAT, REV Act,HORZ.,CELCIUS

    Johnson Controls

    MSRP: $299.90
    Now: $231.74
    Johnson Controls T-4002-9009 TSTAT, REV Act,HORZ.,CELCIUS 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: $299.90
    Now: $231.74
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    Hoshizaki 4A2879-01 Thermostat A30-3952

    Hoshizaki

    MSRP: $188.84
    Now: $145.92
    Hoshizaki 4A2879-01 Thermostat A30-3952 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: $188.84
    Now: $145.92
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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.