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Thermostats / Sensors

Thermostats / Sensors

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    Trane THT2435 120-150F Auto Limit Switch

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    MSRP: $107.50
    Now: $83.07
    120-150F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $107.50
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    Trane THT2409 24/277V Auto C/O 4Spd Hor.Stat

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    MSRP: $258.27
    Now: $199.58
    24/277V Auto C/O 4Spd Hor.Stat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $258.27
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    Trane THT2243 240V SPST Thermostat;105Op73Cl

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    MSRP: $46.18
    Now: $35.69
    240V SPST Thermostat;105Op73Cl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $46.18
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    Trane THT2183 240V SPST High Temperature Stat

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    MSRP: $104.92
    Now: $81.08
    240V SPST High Temperature Stat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $104.92
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    Trane THT1500 120/240V SPST Stat; 55Op 30Cl

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    MSRP: $133.44
    Now: $103.11
    120/240V SPST Stat; 55Op 30Cl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $133.44
    Now: $103.11
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    Trane THT1234 Wall Stat W/External Adj Setpt

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    MSRP: $123.68
    Now: $95.57
    Wall Stat W/External Adj Setpt   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $123.68
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    Trane THT0860 Thermostat Open145 Close100

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    MSRP: $145.63
    Now: $112.53
    Thermostat Open145 Close100   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $145.63
    Now: $112.53
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    Trane THT0741 Outdoor Thermostat 76Op 80Cl

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    MSRP: $44.98
    Now: $34.76
    Trane THT0741 Outdoor Thermostat 76Op 80Cl 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: $44.98
    Now: $34.76
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    Trane THT0680 Temperature Control Thermostat

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    MSRP: $93.87
    Now: $72.53
    Temperature Control Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $93.87
    Now: $72.53
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    Trane THT0660 115-155F Auto Limit Switch

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    MSRP: $200.99
    Now: $155.31
    115-155F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $200.99
    Now: $155.31
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    Trane THT0631 76-80F Auto Limit Switch

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    MSRP: $191.25
    Now: $144.89
    76-80F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $191.25
    Now: $144.89
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    Trane THT0621 65/80f Adjustable Thermostat

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    MSRP: $91.51
    Now: $70.71
    65/80f Adjustable Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $91.51
    Now: $70.71
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    Trane THT0485 115-140F Auto Limit Switch

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    MSRP: $119.06
    Now: $92.00
    115-140F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $119.06
    Now: $92.00
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    MSRP: $119.06
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    Trane SEN1951 Flame Sensor

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    MSRP: $131.09
    Now: $99.31
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $131.09
    Now: $99.31
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    Trane SEN1578 Programmable Zone Sensor

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    MSRP: $618.40
    Now: $477.86
    Programmable Zone Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $618.40
    Now: $477.86
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    Trane SEN1577 Programmable Zone Sensor

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    MSRP: $548.67
    Now: $423.98
    Programmable Zone Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $548.67
    Now: $423.98
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    MSRP: $548.67
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    Trane SEN1540 Ambient Sensor Assembly

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    MSRP: $22.52
    Now: $17.40
    Ambient Sensor Assembly   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $22.52
    Now: $17.40
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    Trane SEN1526 Cl/Off/Ht/Fan Fan System Sensor

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    MSRP: $200.14
    Now: $154.66
    Cl/Off/Ht/Fan Fan System Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $200.14
    Now: $154.66
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    Trane SEN1524 Zone Sensor/Stat; 2 Speed Fan

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    MSRP: $199.25
    Now: $153.97
    Zone Sensor/Stat; 2 Speed Fan   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $199.25
    Now: $153.97
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    Trane SEN1523 Zone Sensor

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    MSRP: $438.11
    Now: $338.54
    Zone Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $438.11
    Now: $338.54
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    MSRP: $438.11
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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.