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Thermostats / Sensors

Thermostats / Sensors

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    Honeywell T451A3005 MEDIUM DUTY 120V STAT 44-86DEG

    Honeywell

    MSRP: $181.48
    Now: $140.24
    Honeywell T451A3005 MEDIUM DUTY 120V STAT 44-86DEG 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: $181.48
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    Resideo TH1100DH1004 NonProgDigStat HeatOnlyHoriz

    Resideo

    MSRP: $67.91
    Now: $52.48
    Resideo TH1100DH1004 NonProgDigStat HeatOnlyHoriz 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: $67.91
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    Resideo TH109PLUS 240V 40-85F Triac Thermostat

    Honeywell

    MSRP: $85.78
    Now: $66.29
    Resideo TH109PLUS 240V 40-85F Triac 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: $85.78
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    Resideo 32003796-001 COVER PLATE FOR TH8000 STATS

    Resideo

    MSRP: $23.86
    Now: $18.44
    Resideo 32003796-001 COVER PLATE FOR TH8000 STATS 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: $23.86
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    Honeywell 14004878-700 PremiumWhiteTstatCoverNoDisply

    Honeywell

    MSRP: $164.98
    Now: $127.49
    Honeywell 14004878-700 PremiumWhiteTstatCoverNoDisply 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: $164.98
    Now: $127.49
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    Resideo C7189R1004 Wireless Indoor Air Sensor

    Resideo

    MSRP: $88.42
    Now: $68.33
    Resideo C7189R1004 Wireless Indoor Air Sensor 0/120 Degree Operating Temperature 5/90 Percent RH Non Condensing Humidity Range Used to Sense Temperature and Humidty Remotely Average Temperature and Humidity and Dehumidify in Separate Locations Used...
    MSRP: $88.42
    Now: $68.33
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    Resideo YTHM1004R3001 T10+ PRO SMART THERMOSTAT KIT

    Resideo

    MSRP: $717.85
    Now: $554.70
    Resideo YTHM1004R3001 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: $717.85
    Now: $554.70
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    Resideo TH4110U2005 T4 Programmable Thermostat

    Resideo

    MSRP: $95.22
    Now: $73.58
    Resideo TH4110U2005 T4 Programmable Thermostat 20-30Vac 1 Heat/1 Cool Heat Pump or 1 Heat/1 Cool Conventional Heat-Off-Cool-Auto System Switching, Auto-On Fan Switching Auto or Manual Changeover Premier White 40-90 Degree Heat Temperature Setting...
    MSRP: $95.22
    Now: $73.58
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    Honeywell TP973A2076 STANDARD MODEL,T-STAT ONLY

    Honeywell

    MSRP: $338.27
    Now: $261.39
    Honeywell TP973A2076 STANDARD MODEL,T-STAT ONLY 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: $338.27
    Now: $261.39
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    Resideo TH1110E1000 E1 NON-PROG STAT

    Honeywell

    MSRP: $41.23
    Now: $31.24
    Resideo TH1110E1000 E1 NON-PROG 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: $41.23
    Now: $31.24
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    Resideo TH3210U2004 2HT/1CL NON-PROG TSTAT,BACKLIT

    Honeywell

    MSRP: $77.53
    Now: $59.91
    Resideo TH3210U2004 2HT/1CL NON-PROG TSTAT,BACKLIT 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: $77.53
    Now: $59.91
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    Resideo T498B1512 ELEC.HT TSTAT DPST 40-80F

    Resideo

    MSRP: $77.88
    Now: $60.18
    Resideo T498B1512 ELEC.HT TSTAT DPST 40-80F 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: $77.88
    Now: $60.18
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    Resideo TH3110U2008 1HT/1CL NON-PROG TSTAT,BACKLIT

    Honeywell

    MSRP: $49.48
    Now: $37.49
    Resideo TH3110U2008 1HT/1CL NON-PROG TSTAT,BACKLIT 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: $49.48
    Now: $37.49
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    Honeywell C7400S1018/B EnthalpySensorF/W7220 Sylkbus

    Honeywell

    MSRP: $65.98
    Now: $50.99
    Honeywell C7400S1018/B EnthalpySensorF/W7220 Sylkbus 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: $65.98
    Now: $50.99
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    Resideo TH2320WF4010 Focuspro Stat Wifi Smart 3H2C

    Resideo

    MSRP: $128.95
    Now: $99.64
    Resideo TH2320WF4010 Focuspro Stat Wifi Smart 3H2C 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: $128.95
    Now: $99.64
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    Resideo TH1110U4000 Focuspro Stat Non-Prog 1H 1C

    Resideo

    MSRP: $39.06
    Now: $30.18
    Resideo TH1110U4000 Focuspro Stat Non-Prog 1H 1C 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: $39.06
    Now: $30.18
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    Resideo TH2110WF4008 Focuspro Stat Wifi Smart 1H1C

    Resideo

    MSRP: $104.30
    Now: $80.59
    Resideo TH2110WF4008 Focuspro Stat Wifi Smart 1H1C 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: $104.30
    Now: $80.59
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    Honeywell C7400A2001 EnthalpySensorDuct4/20ma Output

    Honeywell

    MSRP: $195.89
    Now: $151.37
    Honeywell C7400A2001 EnthalpySensorDuct4/20maOutput 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: $195.89
    Now: $151.37
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    Resideo TH2320U4006 Focuspro Stat Prog 3H 2C

    Resideo

    MSRP: $87.24
    Now: $67.41
    Resideo TH2320U4006 Focuspro Stat Prog 3H 2C 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: $87.24
    Now: $67.41
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    Resideo TH1320U4002 Focuspro Stat Non-Prog 3H 2C

    Resideo

    MSRP: $76.16
    Now: $58.85
    Resideo TH1320U4002 Focuspro Stat Non-Prog 3H 2C 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: $76.16
    Now: $58.85
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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.