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Thermostats / Sensors

Thermostats / Sensors

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    Resideo T812A1010 HEAT ONLY T-STAT SPST POS OFF

    Resideo

    MSRP: $32.08
    Now: $24.79
    Resideo T812A1010 HEAT ONLY T-STAT SPST POS OFF 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: $32.08
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    Resideo THX321WFS3001W T10 Pro Smart Thermostat w/Redlk Sensor

    Resideo

    MSRP: $402.60
    Now: $311.10
    Resideo THX321WFS3001W T10 Pro Smart Thermostat w/Redlk Sensor 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: $402.60
    Now: $311.10
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    Resideo TL8230A1003 Line Volt Pro 8000 7 Day Programmable Electric Heat Thermostat

    Resideo

    MSRP: $145.28
    Now: $112.26
    Resideo TL8230A1003 Line Volt Pro 8000 7 Day Programmable Electric Heat Thermostat 1 Stage Heat 2.67 Square Inch Display DPST Switching Action 40-86 Degree Temperature Setting Range Vertical Mounting 15 Amps Maximum 3600 Watts @ 240Vac, 3120 Watts...
    MSRP: $145.28
    Now: $112.26
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    Resideo TH106 7DayProgLineVoltElecHeatStat

    Resideo

    MSRP: $137.11
    Now: $105.95
    Resideo TH106 7DayProgLineVoltElecHeatStat 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: $137.11
    Now: $105.95
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    Resideo C7089U1006 OutdoorSensor ForVisionProStat

    Resideo

    MSRP: $53.59
    Now: $41.41
    Resideo C7089U1006 OutdoorSensor ForVisionProStat 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: $53.59
    Now: $41.41
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    Resideo T822K1000 VERT HTG STAT 24V HEAT/OFF

    Resideo

    MSRP: $64.48
    Now: $49.83
    Resideo T822K1000 VERT HTG STAT 24V HEAT/OFF 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: $64.48
    Now: $49.83
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    Resideo T87N1018 ThermostatRoundCelsius24v1H/1C

    Resideo

    MSRP: $130.18
    Now: $100.60
    Resideo T87N1018 ThermostatRoundCelsius24v1H/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: $130.18
    Now: $100.60
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    Resideo T812A1002 Heat Only T-stat SPST 24V Whit

    Resideo

    MSRP: $32.16
    Now: $24.85
    Resideo T812A1002 Heat Only T-stat SPST 24V Whit 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: $32.16
    Now: $24.85
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    Resideo T498A1786 THERMOSTAT BEIGE

    Honeywell

    MSRP: $46.18
    Now: $35.69
    Resideo T498A1786 THERMOSTAT BEIGE 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: $46.18
    Now: $35.69
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    Resideo TH3110D1008 Pro 3000 Non Programmable Thermostat

    Honeywell

    MSRP: $98.98
    Now: $76.49
    Resideo TH3110D1008 Pro 3000 Non Programmable Thermostat 20-30Vac or 750mV 1 Heat/1 Cool Conventional Systems and Heat Pumps with No Auxiliary Heat Heat-Off-Cool System Switching Auto-On Fan Switching 40-90 Degree Heat Temperature Setting Range ...
    MSRP: $98.98
    Now: $76.49
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    Resideo TH2110DH1002 Pro2000progDigTstat 1ht/1cl

    Honeywell

    MSRP: $98.98
    Now: $76.49
    Resideo TH2110DH1002 Pro2000progDigTstat 1ht/1cl 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: $98.98
    Now: $76.49
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    Resideo T4398B1029 DPST DUAL DIAPH.ELEC STAT-WHIT

    Resideo

    MSRP: $71.48
    Now: $55.23
    Resideo T4398B1029 DPST DUAL DIAPH.ELEC STAT-WHIT 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: $71.48
    Now: $55.23
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    Resideo TH4210U2002 Programable Thermostat 2HT/1CL T4

    Resideo

    MSRP: $115.12
    Now: $88.96
    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: $115.12
    Now: $88.96
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    Honeywell TC300B-G CommStat FCU 24v, Grey

    Honeywell

    MSRP: $305.83
    Now: $236.32
    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: $305.83
    Now: $236.32
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    Resideo YTHM1004R3000 T10+ PRO SMART THERMOSTAT KIT

    Resideo

    MSRP: $652.36
    Now: $504.10
    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: $652.36
    Now: $504.10
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    Resideo T4398B1003 LineVoltElectricHeatStat

    Resideo

    MSRP: $66.92
    Now: $51.71
    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: $66.92
    Now: $51.71
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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

    Resideo

    MSRP: $234.43
    Now: $181.15
    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: $234.43
    Now: $181.15
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    Resideo THX321WF3003W 24v 2H/2C PROGRAM Wifi Stat

    Resideo

    MSRP: $352.29
    Now: $272.23
    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: $352.29
    Now: $272.23
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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.