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Thermostats / Sensors

Thermostats / Sensors

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    Resideo TH4210U2002 Programable Thermostat 2HT/1CL T4

    Resideo

    MSRP: $105.58
    Now: $81.59
    Resideo TH4210U2002 Programable Thermostat 2HT/1CL T4 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: $105.58
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    Honeywell TC300B-G CommStat FCU 24v, Grey

    Honeywell

    MSRP: $321.63
    Now: $248.54
    Honeywell TC300B-G CommStat FCU 24v, Grey 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: $321.63
    Now: $248.54
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    Resideo YTHM1004R3000 T10+ PRO SMART THERMOSTAT KIT

    Honeywell

    MSRP: $668.53
    Now: $516.59
    Resideo YTHM1004R3000 T10+ PRO SMART 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: $668.53
    Now: $516.59
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    Resideo T4398B1003 LineVoltElectricHeatStat

    Resideo

    MSRP: $61.94
    Now: $47.86
    Resideo T4398B1003 LineVoltElectricHeatStat 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: $61.94
    Now: $47.86
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    Resideo T498A1927 5-25C 1HEAT LINE VOLT STAT

    Honeywell

    MSRP: $42.88
    Now: $33.14
    Resideo T498A1927 5-25C 1HEAT LINE VOLT 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: $42.88
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    Resideo THM04R3000 EIM FOR T10+ Thermostats

    Honeywell

    MSRP: $255.73
    Now: $197.61
    Resideo THM04R3000 EIM FOR T10+ Thermostats 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: $255.73
    Now: $197.61
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    Resideo THX321WF3003W 24v 2H/2C PROGRAM Wifi Stat

    Honeywell

    MSRP: $372.67
    Now: $287.97
    Resideo THX321WF3003W 24v 2H/2C PROGRAM Wifi 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: $372.67
    Now: $287.97
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    Resideo TH115-A-240S-B LineVoltTstatElectricHeat

    Resideo

    MSRP: $162.48
    Now: $125.55
    Resideo TH115-A-240S-B LineVoltTstatElectricHeat 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: $162.48
    Now: $125.55
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    Resideo TH135-01-B 24V THERMOSTAT

    Resideo

    MSRP: $108.16
    Now: $83.58
    Resideo TH135-01-B 24V 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: $108.16
    Now: $83.58
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    Resideo TH6320ZW2007 Zwave T6Pro Prog Smart Thermostat

    Resideo

    MSRP: $240.92
    Now: $186.16
    Resideo TH6320ZW2007 Zwave T6Pro Prog Smart 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: $240.92
    Now: $186.16
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    Honeywell TP970A2004 T-STAT 2-PIPE D/A 60-90F

    Honeywell

    MSRP: $327.33
    Now: $252.93
    Honeywell TP970A2004 T-STAT 2-PIPE D/A 60-90F 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: $327.33
    Now: $252.93
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    Honeywell LP916B1074 65/85F RETURN AIR TSTAT

    Honeywell

    MSRP: $955.50
    Now: $738.34
    Honeywell LP916B1074 65/85F RETURN AIR 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: $955.50
    Now: $738.34
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    Resideo TH115-A-240D-B 7dayProgElecHeatTstat

    Resideo

    MSRP: $162.48
    Now: $125.55
    Resideo TH115-A-240D-B 7dayProgElecHeatTstat 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: $162.48
    Now: $125.55
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    Resideo TH1110DH1003 Pro1000nonProgDigital Tstat

    Honeywell

    MSRP: $75.88
    Now: $58.64
    Resideo TH1110DH1003 Pro1000nonProgDigital 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: $75.88
    Now: $58.64
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    Resideo TH2110U4004 P200 FOCUSPRO PROG TSTAT

    Resideo

    MSRP: $57.47
    Now: $44.41
    Resideo TH2110U4004 P200 FOCUSPRO PROG 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: $57.47
    Now: $44.41
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    Heatcraft Refrigeration 28908601 L75-35F Thermostat

    Heatcraft Refrigeration

    MSRP: $95.29
    Now: $73.63
    Heatcraft Refrigeration 28908601 L75-35F 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: $95.29
    Now: $73.63
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    Heatcraft Refrigeration 5521R 2 WIRE THERMOSTAT

    Heatcraft Refrigeration

    MSRP: $124.16
    Now: $95.94
    Heatcraft Refrigeration 5521R 2 WIRE 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: $124.16
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    Heatcraft Refrigeration 28963301 TstatA421ELEC-120/240VACNEMA4X

    Heatcraft Refrigeration

    MSRP: $604.16
    Now: $466.85
    Heatcraft Refrigeration 28963301 TstatA421ELEC-120/240VACNEMA4X 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: $604.16
    Now: $466.85
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    International Comfort Products 1193999 THERMOSTAT 60TX (165/65)

    International Comfort Products

    MSRP: $28.15
    Now: $21.75
    International Comfort Products 1193999 THERMOSTAT 60TX (165/65) 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: $28.15
    Now: $21.75
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    International Comfort Products NASA00201FS EVAPORATOR FREEZE THERMOSTAT

    International Comfort Products

    MSRP: $58.36
    Now: $44.21
    International Comfort Products NASA00201FS EVAPORATOR FREEZE 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...
    MSRP: $58.36
    Now: $44.21
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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.