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Thermostats / Sensors

Thermostats / Sensors

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    Lochinvar & A.O. Smith 100297104 FLUE SENSOR W/GROMMET

    Lochinvar & A.O. Smith

    MSRP: $86.41
    Now: $66.77
    Lochinvar & A.O. Smith 100297104 FLUE SENSOR W/GROMMET 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: $86.41
    Now: $66.77
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    Lochinvar & A.O. Smith 100208557 Dual Outlet Sensor

    Lochinvar & A.O. Smith

    MSRP: $107.65
    Now: $83.18
    Lochinvar & A.O. Smith 100208557 Dual Outlet 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...
    MSRP: $107.65
    Now: $83.18
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    York 025-36433-001 SENSOR TEMP. HUMIDITY

    York

    MSRP: $849.22
    Now: $656.22
    York 025-36433-001 SENSOR TEMP. HUMIDITY 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: $849.22
    Now: $656.22
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    Resideo TH6210U2001 (Replaces TH6110D1005) T6 PRO Programmable Thermostat

    Resideo

    MSRP: $121.85
    Now: $94.16
    Resideo TH6210U2001 (Replaces TH6110D1005) T6 PRO Programmable Thermostat 20-30 Vac 1 Heat/ 1 Cool Conventional Systems 2 Heat/1 Cool Heat Pumps Programmability: 7 Day, 5-1-1 Day, 5-2 Day or Non Programmable 40-90 Degree Heat Setting 50-99 Degree...
    MSRP: $121.85
    Now: $94.16
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    Johnson Controls HE-69S3-0NP0 SENSOR %RH & 1035 OHM SI,DUCT

    Johnson Controls

    MSRP: $477.81
    Now: $369.21
    Johnson Controls HE-69S3-0NP0 SENSOR %RH & 1035 OHM SI,DUCT  FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum Order...
    MSRP: $477.81
    Now: $369.21
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    Johnson Controls TE-634AM-2 Temperature Sensor

    Johnson Controls

    MSRP: $40.80
    Now: $30.91
    Johnson Controls TE-634AM-2 Temperature Sensor Well Mounting Thermistor Element 6" Probe Length  FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM...
    MSRP: $40.80
    Now: $30.91
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    Honeywell H7725B2006 DUCT HUMDTY SENSOR RH W/20K TEMP

    Honeywell

    MSRP: $544.27
    Now: $420.57
    Honeywell H7725B2006 DUCT HUMDTY SENSOR RH W/20K TEMP  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: $544.27
    Now: $420.57
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    Lennox 24Z12 (Replaces 51M32) Thermostat BB 1030 Non-Prog 1H/1C

    Lennox

    MSRP: $70.55
    Now: $54.52
    Lennox 24Z12 (Replaces 51M32) Thermostat BB 1030 Non-Prog 1H/1C  This is the Direct Replacement for 51M33 per Lennox, but may require rewiring as this is not Identical.  FurnacePartSource.com Commitment Always Brand-New Genuine...
    MSRP: $70.55
    Now: $54.52
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    Lennox 24Z17 (Replaces 51M37) COMFORTSENSE 3000 L3532U

    Lennox

    MSRP: $216.22
    Now: $167.08
    Lennox 24Z17 (Replaces 51M37) COMFORTSENSE 3000 L3532U This is the Functional Replacement for 51M37 FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM...
    MSRP: $216.22
    Now: $167.08
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    MSRP: $216.22
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    Danfoss 084Z8214 Temp Sensor

    Danfoss

    MSRP: $1,170.31
    Now: $886.60
    Danfoss 084Z8214 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: $1,170.31
    Now: $886.60
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    Danfoss 084N0005 AKS 11 Sensor

    Danfoss

    MSRP: $128.90
    Now: $99.60
    Danfoss 084N0005 AKS 11 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: $128.90
    Now: $99.60
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    Aprilaire S86NMU (Replaces 8600, 8476 & 8448) DIGITAL THERMOSTAT

    Aprilaire

    MSRP: $138.44
    Now: $106.97
    Aprilaire S86NMU (Replaces 8600, 8476 & 8448) DIGITAL THERMOSTAT This is the Direct Replacement for 8476, 8448, and 8600 FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when...
    MSRP: $138.44
    Now: $106.97
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    MSRP: $138.44
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    York 025-39517-000 3000 OHM TEMP SENSOR

    York

    MSRP: $505.00
    Now: $390.23
    York 025-39517-000 3000 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: $505.00
    Now: $390.23
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    Trane ACONT302AS42DA (Replaces TCONT802AS32DAA) Programmable Thermostat

    Trane

    MSRP: $305.12
    Now: $235.77
    Trane ACONT302AS42DA (Replaces TCONT802AS32DAA) Programmable Thermostat 7day 4H/2H   This is the direct Replacement for TCONT802AS32DAA    FurnacePartSource.com Commitment Always Brand-New Genuine Parts In...
    MSRP: $305.12
    Now: $235.77
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    Robertshaw RS9110 (Replaces RS3110) Thermostat 7-Day 5-1-1 NP 1H/1C

    Robertshaw

    MSRP: $74.05
    Now: $57.22
    Robertshaw RS9110 (Replaces RS3110) Thermostat 7-Day 5-1-1 NP 1H/1C  This is the Direct Replacement for RS3110 FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day...
    MSRP: $74.05
    Now: $57.22
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    Honeywell P7600PROBE DUCT MOUNT PRESSURE PROBE

    Honeywell

    MSRP: $77.32
    Now: $59.75
    Honeywell P7600PROBE DUCT MOUNT PRESSURE PROBE This is Part 2 of 2 parts that are the Direct Replacement for P7650U1052   FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day...
    MSRP: $77.32
    Now: $59.75
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    Danfoss 060H1708 Thermostat -20/85F 59"CAP WALL MOUNT 140MAX

    Danfoss

    MSRP: $74.12
    Now: $57.27
    Danfoss 060H1708 Thermostat -20/85F 59"CAP WALL MOUNT 140MAX     FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts ship Same Business Day when ordered by 5PM ET No Minimum...
    MSRP: $74.12
    Now: $57.27
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    Honeywell P7660P1000X UNIV PRESSURE SENSOR 1.0/2.5/5/10"wc

    Honeywell

    MSRP: $383.48
    Now: $296.32
    Honeywell P7660P1000X UNIV PRESSURE SENSOR 1.0/2.5/5/10"wc This is Part 1 of 2 parts that are the Direct Replacement for P7650U1052   FurnacePartSource.com Commitment Always Brand-New Genuine Parts In stock parts...
    MSRP: $383.48
    Now: $296.32
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    RBI Boiler 62111041 Flue Gas Sensor

    Rbi Boiler

    MSRP: $58.34
    Now: $44.20
    RBI Boiler 62111041 Flue Gas 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: $58.34
    Now: $44.20
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    RBI Boiler 62111044 REED MAGNETIC SENSOR

    Rbi Boiler

    MSRP: $67.32
    Now: $51.00
    RBI Boiler 62111044 REED MAGNETIC 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: $67.32
    Now: $51.00
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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.