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Furnace & HVAC Sensors

Furnace & HVAC Sensors

Shop furnace and HVAC replacement sensors for residential, commercial, and industrial heating and cooling systems. Furnace Part Source carries temperature sensors, immersion sensors, humidity sensors, flow sensors, and safety probes from Honeywell, Siemens, Veris Industries, MAMAC Systems, System Sensor, and other leading brands.

Use the product list below to find the correct sensor by part number, sensor type, or equipment model. Always confirm resistance value, output signal, mounting style, and equipment model before ordering to help avoid compatibility issues.

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    Honeywell LP914A1268 40/240F Duct Mt.Temp.Sensor

    Honeywell

    MSRP: $647.25
    Now: $500.14
    Honeywell LP914A1268 40/240F Duct Mt.Temp.Sensorl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements...
    MSRP: $647.25
    Now: $500.14
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    MSRP: $647.25
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    Honeywell LP914A1029 15" Temp Snr,Da,3-15Psi,40-240F

    Honeywell

    MSRP: $800.76
    Now: $618.77
    Honeywell LP914A1029 15" Temp Snr,Da,3-15Psi,40-240Fl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $800.76
    Now: $618.77
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    Honeywell LP914A1011 -40/160F,15"Avg.Temp. Sensor

    Honeywell

    MSRP: $3,403.36
    Now: $2,629.87
    Honeywell LP914A1011 -40/160F,15"Avg.Temp. Sensorl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $3,403.36
    Now: $2,629.87
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    MSRP: $3,403.36
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    Honeywell C7835A1009 Communicating Discharge Air Sensr

    Resideo

    MSRP: $152.03
    Now: $117.48
    Honeywell C7835A1009 Communicating Discharge Air Sensrl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $152.03
    Now: $117.48
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    MSRP: $152.03
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    Honeywell C7772G1004 Wall Mnt Temp Sens W/O Logo

    Honeywell

    MSRP: $60.79
    Now: $46.97
    Honeywell C7772G1004 Wall Mnt Temp Sens W/O Logol  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements...
    MSRP: $60.79
    Now: $46.97
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    MSRP: $60.79
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    Honeywell C7772F1012 Wall Mnt Temp Sens W/ Logo

    Honeywell

    MSRP: $61.26
    Now: $47.34
    Honeywell C7772F1012 Wall Mnt Temp Sens W/ Logol  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $61.26
    Now: $47.34
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    MSRP: $61.26
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    Honeywell C7772F1004 Wall Mnt Temp Sens W/O Logo

    Honeywell

    MSRP: $54.43
    Now: $42.06
    Honeywell C7772F1004 Wall Mnt Temp Sens W/O Logol  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements...
    MSRP: $54.43
    Now: $42.06
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    MSRP: $54.43
    Now: $42.06
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    Honeywell C7772A1004 20Kohm Flush Mt. Temp Snsr Ntc

    Honeywell

    MSRP: $48.89
    Now: $37.78
    Honeywell C7772A1004 20Kohm Flush Mt. Temp Snsr Ntcl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $48.89
    Now: $37.78
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    MSRP: $48.89
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    Honeywell C7632B1002 Duct Mnt Co2 Sensor,W/Odisplay

    Honeywell

    MSRP: $587.58
    Now: $454.04
    Honeywell C7632B1002 Duct Mnt Co2 Sensor,W/Odisplayl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $587.58
    Now: $454.04
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    MSRP: $587.58
    Now: $454.04
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    Honeywell C7600C2001 Humidity Sensor, Relative In Air

    Honeywell

    MSRP: $217.75
    Now: $168.26
    Honeywell C7600C2001 Humidity Sensor, Relative In Airl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $217.75
    Now: $168.26
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    MSRP: $217.75
    Now: $168.26
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    Honeywell C7600B2008 2-10Vdc Humd Sensor Wall Mt.

    Honeywell

    MSRP: $298.52
    Now: $230.67
    Honeywell C7600B2008 2-10Vdc Humd Sensor Wall Mt.l  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $298.52
    Now: $230.67
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    MSRP: $298.52
    Now: $230.67
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    Honeywell C7600A2008 Solid State Humidity Sensor

    Honeywell

    MSRP: $203.69
    Now: $157.40
    Honeywell C7600A2008 Solid State Humidity Sensorl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements...
    MSRP: $203.69
    Now: $157.40
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    MSRP: $203.69
    Now: $157.40
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    Honeywell C7400S1000 Enthalpy Sensor F/W7220 Sylkbus

    Honeywell

    MSRP: $161.57
    Now: $124.85
    Honeywell C7400S1000 Enthalpy Sensor F/W7220 Sylkbusl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $161.57
    Now: $124.85
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    MSRP: $161.57
    Now: $124.85
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    Honeywell C7400C2007 Enthalpy Sensor,4/20 Ma Output

    Honeywell

    MSRP: $161.57
    Now: $124.85
    Honeywell C7400C2007 Enthalpy Sensor,4/20 Ma Outputl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $161.57
    Now: $124.85
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    MSRP: $161.57
    Now: $124.85
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    Honeywell C7262A1008 Co2 Temp Wall Mt Sensor W/Display

    Honeywell

    MSRP: $709.48
    Now: $537.49
    Honeywell C7262A1008 Co2 Temp Wall Mt Sensor W/Displayl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order...
    MSRP: $709.48
    Now: $537.49
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    MSRP: $709.48
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    Honeywell C7232B1030 Co2 Sensor,Dct Mnt W/O Display

    Honeywell

    MSRP: $723.66
    Now: $559.19
    Honeywell C7232B1030 Co2 Sensor,Dct Mnt W/O Displayl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $723.66
    Now: $559.19
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    MSRP: $723.66
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    Honeywell C7232B1022 Co2 Sensor,Dct Mnt W/Display

    Honeywell

    MSRP: $742.22
    Now: $573.53
    Honeywell C7232B1022 Co2 Sensor,Dct Mnt W/Displayl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $742.22
    Now: $573.53
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    MSRP: $742.22
    Now: $573.53
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    Honeywell C7232B1014 Co2 Sensor,Duct Mt Wo/Display

    Honeywell

    MSRP: $692.74
    Now: $535.30
    Honeywell C7232B1014 Co2 Sensor,Duct Mt Wo/Displayl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $692.74
    Now: $535.30
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    MSRP: $692.74
    Now: $535.30
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    Honeywell C7232B1006 Co2 Sensor Duct Mt 1-10Vdcout

    Honeywell

    MSRP: $698.91
    Now: $540.06
    Honeywell C7232B1006 Co2 Sensor Duct Mt 1-10Vdcoutl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order...
    MSRP: $698.91
    Now: $540.06
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    MSRP: $698.91
    Now: $540.06
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    Honeywell C7150B1004 Mixed/Discharge Air Sensor

    Honeywell

    MSRP: $46.48
    Now: $35.21
    Honeywell C7150B1004 Mixed/Discharge Air Sensorl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $46.48
    Now: $35.21
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    MSRP: $46.48
    Now: $35.21
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Furnace & HVAC Sensors

Furnace and HVAC sensors monitor temperature, airflow, flame presence, humidity, and other conditions that keep a heating or cooling system operating safely and efficiently. When a sensor fails or reads inaccurately, it can cause lockouts, poor comfort control, or unsafe operation.

Furnace Part Source carries a wide range of replacement sensors, including duct and immersion temperature sensors, outside air sensors, humidity sensors, flow sensors, and safety-related probes for residential, commercial, and industrial HVAC equipment.

Common Sensors We Carry

Common replacement sensors include:

  • Duct and immersion temperature sensors for supply, return, and water temperature readings.
  • Outside air temperature and humidity sensors for outdoor reset and economizer control.
  • Flow sensors for airflow and duct pressure monitoring.
  • Low-level and safety probe sensors for boiler and water-level protection.
  • Gas and smoke detection sensors for combustible gas and safety monitoring.

How to Find the Right Sensor

Before ordering, confirm the sensor's resistance value (such as 10K or 20K ohm), output signal type, mounting style, and the equipment model it is used with. Sensors that look similar can have different resistance curves or output signals, so matching by part number is the safest approach.

For best fit, compare:

  • Original sensor part number
  • Resistance value or output signal type
  • Sensor style, such as duct, immersion, outside air, or surface-mount
  • Equipment model and control system

Sensors From Leading HVAC Brands

Our catalog includes sensors from Honeywell, Siemens Building Technology, Veris Industries, MAMAC Systems, System Sensor, Dwyer Instruments, Aaon, Kele, and other major manufacturers, covering both standard replacement sensors and specialized industrial sensing equipment.

Need Help Matching a Sensor?

Not sure which sensor you need? Use the part number, resistance value, and control system information from your equipment to narrow the search, or contact Furnace Part Source for help identifying the correct replacement.

HVAC Sensor FAQs

What types of sensors does an HVAC system use?

HVAC systems commonly use temperature sensors, humidity sensors, flow sensors, flame sensors, and safety probes to monitor conditions and support proper system control.

How do I know what resistance value my sensor needs?

Check the original sensor's part number or the equipment documentation, which typically lists the resistance value, such as 10K or 20K ohm, required for compatibility.

Can a bad sensor cause my system to shut down?

Yes. A failed or inaccurate sensor reading can trigger lockouts or prevent proper operation, particularly for safety-related sensors like low-water or flame sensors.

Are furnace sensors and thermostat sensors the same?

No. Furnace and HVAC sensors typically monitor internal equipment conditions, while thermostat sensors read room temperature for comfort control. Always confirm the specific application before ordering.