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Thermostats / Sensors

Thermostats / Sensors

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    Johnson Controls GM202-MH00 A2L Refrigeration Sensor R454B

    Johnson Controls

    MSRP: $295.05
    Now: $228.00
    Johnson Controls GM202-MH00 A2L Refrigeration Sensor R454B, RS485 Modbus output 24 V 2 ft cable with male Connector FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by...
    MSRP: $295.05
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    Lennox 87N54 Ventostat CO2/RH/Temp Sensor

    Lennox

    MSRP: $654.88
    Now: $506.05
    Lennox 87N54 Ventostat CO2/RH/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: $654.88
    Now: $506.05
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    Johnson Controls GM203-MH00 A2L Refrigeration Sensor R454C, RS485

    Johnson Controls

    MSRP: $295.05
    Now: $228.00
    Johnson Controls GM203-MH00 A2L Refrigeration Sensor R454C, RS485 Modbus output 24 V 2 ft cable with male connector FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by...
    MSRP: $295.05
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    Rheem-Ruud AS46852-1 Leak Sensor Assembly / Housing G2

    Rheem-Ruud

    MSRP: $66.69
    Now: $51.54
    Rheem-Ruud AS46852-1 Leak Sensor Assembly / Housing G2 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: $66.69
    Now: $51.54
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    Honeywell H7655A1001 Humidity and Temperature Transmitter

    Honeywell

    MSRP: $136.93
    Now: $105.81
    Honeywell H7655A1001 Humidity and Temperature Transmitter 18-40VDC/18-28Vac -10/140 Degree Operating Temperature Range 0/95% RH Operating Humidity Range Wall Mount ± 5% from 20-95% RH Accuracy 0-10Vdc Humidity Output FurnacePartSource.com...
    MSRP: $136.93
    Now: $105.81
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    Schneider Electric (Square D) XS630B1PAL2 Proximity Sensor 12-48VDC 1NO

    Schneider Electric (Square D)

    MSRP: $217.82
    Now: $168.31
    Schneider Electric (Square D) XS630B1PAL2 Proximity Sensor 12-48VDC 1NO 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: $217.82
    Now: $168.31
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    Honeywell WRECVRU Receiver for Wireless Temperature Sensor Kit No logo

    Honeywell

    MSRP: $347.80
    Now: $268.76
    Honeywell WRECVRU Receiver for Wireless Temperature Sensor Kit No logo 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: $347.80
    Now: $268.76
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    Bosch HVAC 7747007982 Sensor Temp 1/4 10K Circuit 30

    Bosch HVAC

    MSRP: $48.16
    Now: $37.22
    Bosch HVAC 7747007982 Sensor Temp 1/4 10K Circuit 30 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: $48.16
    Now: $37.22
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    Johnson Controls GM210-MH00 A2L Refrigeration Sensor R455A

    Johnson Controls

    MSRP: $295.05
    Now: $228.00
    Johnson Controls GM210-MH00 A2L Refrigeration Sensor R455A RS485 Modbus output 24 V 2 ft cable with male Connector FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by...
    MSRP: $295.05
    Now: $228.00
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    Trane THT0996 Temp Stat Open:20F Close:25F

    Trane

    MSRP: $77.37
    Now: $59.78
    Trane THT0996 Temp Stat Open:20F Close:25F  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: $77.37
    Now: $59.78
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    International Comfort Products 3900007301 Air Sensor

    International Comfort Products

    MSRP: $34.91
    Now: $26.98
    International Comfort Products 3900007301 Air 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: $34.91
    Now: $26.98
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    Lochinvar & A.O. Smith 100233591 Immersion Thermostat

    Lochinvar & A.O. Smith

    MSRP: $322.36
    Now: $249.10
    Lochinvar & A.O. Smith 100233591 Immersion 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: $322.36
    Now: $249.10
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    Bosch HVAC 8733968186 Sensor A2L

    Bosch HVAC

    MSRP: $156.83
    Now: $121.19
    Bosch HVAC 8733968186 A2L 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: $156.83
    Now: $121.19
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    Trane SEN1318 Sensor

    Trane

    MSRP: $785.05
    Now: $606.63
    Trane SEN1318 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: $785.05
    Now: $606.63
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    York 025-29924-000 Temp Sensor 50K Ohm

    York

    MSRP: $2,545.74
    Now: $1,967.16
    York 025-29924-000 50K Ohm 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: $2,545.74
    Now: $1,967.16
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    Venstar VSACCDSEN Air Temperature Sensor

    Venstar

    MSRP: $34.90
    Now: $26.97
    Venstar VSACCDSEN Air Temperature 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: $34.90
    Now: $26.97
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    Aprilaire 6003 Thermostat

    Aprilaire

    MSRP: $335.25
    Now: $259.05
    Aprilaire 6003 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: $335.25
    Now: $259.05
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    Viessmann 7835114 Flow Sensor B2HA 399-530

    Viessmann

    MSRP: $554.68
    Now: $428.62
    Viessmann 7835114 Flow Sensor B2HA 399-530 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: $554.68
    Now: $428.62
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    Peerless Boiler 54299 Kit Pf Supply Sensor/Limit

    Peerless Boiler

    MSRP: $251.94
    Now: $194.68
    Peerless Boiler 54299 Kit Pf Supply Sensor/Limit 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: $251.94
    Now: $194.68
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    Modine 5H0877820003 Pro1 Thermostat 2Stg

    Modine

    MSRP: $364.77
    Now: $281.86
    Modine 5H0877820003 Pro1 Thermostat 2Stg 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: $364.77
    Now: $281.86
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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.