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Thermostats / Sensors

Thermostats / Sensors

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    Carrier HH18JA066 Defrost Thermostat

    Carrier

    MSRP: $36.12
    Now: $27.36
    Defrost Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $36.12
    Now: $27.36
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    Carrier HH18JA061 Defrost Thermostat

    Carrier

    MSRP: $53.01
    Now: $40.16
    Defrost Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $53.01
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    Carrier HH18HC065 Defrost Thermostat

    Carrier

    MSRP: $334.31
    Now: $253.26
    Defrost Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $334.31
    Now: $253.26
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    Carrier HH18HB052 Defrost Thermostat

    Carrier

    MSRP: $22.37
    Now: $16.95
    Defrost Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $22.37
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    Carrier HH18HB031 Freeze Thermostat SPST 30 Degree Open, 45 Degree Close

    Carrier

    MSRP: $60.22
    Now: $46.54
    Carrier HH18HB031 Freeze Thermostat SPST 30 Degree Open 45 Degree Close 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: $60.22
    Now: $46.54
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    Carrier HH18HA283 Discharge Gas Thermostat, DGT

    Carrier

    MSRP: $86.71
    Now: $67.00
    Discharge Gas Thermostat, DGT   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $86.71
    Now: $67.00
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    Carrier HH18HA036 Defrost Thermostat

    Carrier

    MSRP: $90.59
    Now: $68.63
    Defrost Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $90.59
    Now: $68.63
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    Carrier HH09ZC096 Thermostat (T58EA-14)

    Carrier

    MSRP: $274.63
    Now: $208.05
    Thermostat (T58EA-14)   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $274.63
    Now: $208.05
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    Carrier 50HJ540570 Sensor

    Carrier

    MSRP: $96.31
    Now: $72.96
    Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $96.31
    Now: $72.96
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    Carrier 50DK508237 Supply Air Temperature Sensor

    Carrier

    MSRP: $176.90
    Now: $134.01
    Supply Air Temperature Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $176.90
    Now: $134.01
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    MSRP: $176.90
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    Carrier 48GS400192 Flame Sensor

    Carrier

    MSRP: $21.76
    Now: $16.82
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $21.76
    Now: $16.82
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    Carrier 48DP500613 Flame Sensor

    Carrier

    MSRP: $100.44
    Now: $77.61
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $100.44
    Now: $77.61
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    Carrier 48DJ501022 Ignitor Wire/Sensor

    Carrier

    MSRP: $44.39
    Now: $33.63
    Ignitor Wire/Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $44.39
    Now: $33.63
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    Carrier 48DJ500653 Flame Sensor

    Carrier

    MSRP: $124.82
    Now: $94.56
    Flame Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $124.82
    Now: $94.56
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    MSRP: $124.82
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    Carrier 37AH400342 Carrier Thermostat

    Carrier

    MSRP: $318.91
    Now: $241.60
    Carrier Thermostat   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $318.91
    Now: $241.60
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    MSRP: $318.91
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    Carrier 33ZCT59SPT Wall Sensor

    Carrier

    MSRP: $516.27
    Now: $398.93
    Wall Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $516.27
    Now: $398.93
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    MSRP: $516.27
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    Carrier 33ZCT56SPT Space Sensor W/ Override Button

    Carrier

    MSRP: $151.21
    Now: $116.84
    Space Sensor W/ Override Button   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $151.21
    Now: $116.84
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    MSRP: $151.21
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    Carrier 33ZCSENOAT Outdoor Air Sensor

    Carrier

    MSRP: $139.13
    Now: $105.40
    Outdoor Air Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $139.13
    Now: $105.40
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    Carrier 30GT412176 Temperature Sensor

    Carrier

    MSRP: $151.12
    Now: $116.78
    Temperature Sensor   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $151.12
    Now: $116.78
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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.