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Thermostats / Sensors

Thermostats / Sensors

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    Aaon ASM01838 E-BUS Vertical Outside Air Temperature and Humidity Sensor

    Aaon

    MSRP: $699.72
    Now: $540.69
    Aaon ASM01838 E-BUS Vertical Outside Air Temperature and Humidity 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...
    MSRP: $699.72
    Now: $540.69
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    Resideo THX1000W1 PRO S1000 Thermostat w/Redlink White

    Resideo

    MSRP: $237.09
    Now: $183.20
    Resideo THX1000W1 PRO S1000 Thermostat w/Redlink White 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: $237.09
    Now: $183.20
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    Resideo YTHX1200W7 S1200 Thermostat Kit w/Redlink & Sensor

    Resideo

    MSRP: $407.78
    Now: $315.10
    Resideo YTHX1200W7 S1200 Thermostat Kit w/ Redlink & 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: $407.78
    Now: $315.10
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    Resideo THX1100W3 Elite Pro S1200 Thermostat 4H/2Cor3H/3C

    Resideo

    MSRP: $265.53
    Now: $205.19
    Resideo THX1100W3 Elite Pro S1200 Thermostat 4H/2Cor3H/3C 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: $265.53
    Now: $205.19
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    Siemens Building Technology QAE2030.015 Immersion Temperature Sensor 10k ohm

    Siemens Building Technology

    MSRP: $80.75
    Now: $62.40
    Siemens Building Technology QAE2030.015 Immersion Temperature Sensor 10k Ohm Type 2 Thermistor Output Signal 0 Degree - 250 Degree Fahrenheit (-18 Degree - 121 Degree Celsius) Temperature 6 inches (thermowell included) Probe Length Connection Type:...
    MSRP: $80.75
    Now: $62.40
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    MSRP: $80.75
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    Aaon R32960 Temperature Sensor 2"

    Aaon

    MSRP: $135.96
    Now: $105.06
    Aaon R32960 Temperature Sensor 2" 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: $135.96
    Now: $105.06
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    Tjernlund Products 950-0031 Sensor Tube w/ Inlet Assembly & Gasket

    Tjernlund Products

    MSRP: $127.64
    Now: $98.63
    Tjernlund Products 950-0031 Sensor Tube w/ Inlet Assembly & Gasket 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: $127.64
    Now: $98.63
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    Hydrolevel EL1220-R Standard Ceramic Sensing Probe W/Junc. Box & Cover

    Hydrolevel

    MSRP: $130.09
    Now: $100.52
    Hydrolevel EL1220-R Standard Ceramic Sensing Probe 1/2" npt 2 7/8" Inside Dimension Junction Box with metal cover (Part Number 45-223) FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day...
    MSRP: $130.09
    Now: $100.52
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    System Sensor 5602 Temperature Sensor Single Circuit

    System Sensor

    MSRP: $29.82
    Now: $23.04
    System Sensor 5602 Temperature Sensor Single Circuit 5600 Series Mechanical Heat Detector with 194 degree F Fixed Heat Alarm Point Rate of Rise Alarm Condition Lettering Identification Method FurnacePartSource.com Commitment Always Brand-New...
    MSRP: $29.82
    Now: $23.04
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    Friedrich Air Conditioning WRT2 Remote Thermostat

    Friedrich Air Conditioning

    MSRP: $352.56
    Now: $272.43
    Friedrich Air Conditioning WRT2 Remote 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: $352.56
    Now: $272.43
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    Nortec Humidity 2584842 SP Process Level Sensor PCB RS

    Nortec Humidity

    MSRP: $203.13
    Now: $156.97
    Nortec Humidity 2584842 SP Process Level Sensor PCB RS 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: $203.13
    Now: $156.97
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    MSRP: $203.13
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    Siemens Combustion AGG5.315 Rotational Sensor/Mount 51mm

    Siemens Combustion

    MSRP: $1,566.76
    Now: $1,210.68
    Siemens Combustion AGG5.315 Rotational Sensor/Mount 51mm 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: $1,566.76
    Now: $1,210.68
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    Armstrong International B2960 Low Level Safety Probe Sensor

    Armstrong International

    MSRP: $349.27
    Now: $269.89
    Armstrong International B2960 Low Level Safety Probe 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: $349.27
    Now: $269.89
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    Danfoss 060L224166 KP81 Thermostat Temp Ctrl -40/65c Fixed

    Danfoss

    MSRP: $206.68
    Now: $159.71
    Danfoss 060L224166 KP81 Thermostat Temp Ctrl -40/65c Fixed 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: $206.68
    Now: $159.71
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    Friedrich Air Conditioning RT7 Non Programmable Thermostat

    Friedrich Air Conditioning

    MSRP: $235.93
    Now: $182.31
    Friedrich Air Conditioning RT7 Non Programmable 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: $235.93
    Now: $182.31
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    Stelpro ST-017 Thermostat SP 240/347/600V

    Stelpro

    MSRP: $65.08
    Now: $50.29
    Stelpro ST-017 Thermostat SP 240/347/600V 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: $65.08
    Now: $50.29
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    Veris Industries TIWB1H0 Immersion Temp Sensor

    Veris Industries

    MSRP: $120.05
    Now: $92.77
    Veris Industries TIWB1H0 Immersion Temp 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: $120.05
    Now: $92.77
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    Dwyer Instruments PAFS-1002 Averaging Flow Sensor 3-5/32"

    Dwyer Instruments

    MSRP: $19.44
    Now: $15.02
    Dwyer Instruments PAFS-1002 Averaging Flow Sensor 3 5/32" Insertion Length Air and Compatible Gases 1/4" I.D. 3/8" OD Tubing Process Connection FurnacePartSource.com Com mitment Always Brand-New Genuine Parts In stock parts...
    MSRP: $19.44
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    Lochinvar & A.O. Smith 100233496 Thermostat Well

    Lochinvar & A.O. Smith

    MSRP: $61.56
    Now: $47.57
    Lochinvar & A.O. Smith 100233496 Thermostat Well 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: $61.56
    Now: $47.57
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    York S1-031-02944-000 Return Air Temp Sensor

    York

    MSRP: $119.25
    Now: $92.14
    York S1-031-02944-000 Return Air Temp 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: $119.25
    Now: $92.14
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    MSRP: $119.25
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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.