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Thermostats / Sensors

Thermostats / Sensors

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    Honeywell TL8100A1008 Progline/Low Volt Hydronic Thermostat

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    MSRP: $148.35
    Now: $114.64
    Honeywell TL8100A1008 Progline/Low Volt Hydronic Thermostatl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $148.35
    Now: $114.64
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    Resideo TL7235A1003 Line Volt Pro 7000 Digital Non Programmable Electric Heat Thermostat,

    Resideo

    MSRP: $126.90
    Now: $98.06
    Resideo TL7235A1003 Line Volt Pro 7000 Digital Non Programmable Electric Heat Thermostat 1 Stage Heat 40-86 Degree Temperature Setting Range 15 Amps Maximum, 3600 Watts @ 240Vac 3120 Watts @ 208Vac DPST Switching Action ± 1 Degree Accuracy ...
    MSRP: $126.90
    Now: $98.06
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    Honeywell THP9045A1023 (direct replacement # 2 for YTH8320ZW1007) Wire Saver

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    MSRP: $29.06
    Now: $22.45
    Honeywell THP9045A1023 Wire Saverl TH6320ZW2003 , THP9045A1023 is the direct replacement for YTH8320ZW1007 *You must have both parts to create the replacement*     Click here for TH6320ZW2003     FurnacePartSource.com...
    MSRP: $29.06
    Now: $22.45
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    Honeywell THP2400A1027W White Cover Plate Assembly

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    MSRP: $25.95
    Now: $20.06
    Honeywell THP2400A1027W White Cover Plate Assemblyl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $25.95
    Now: $20.06
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    Honeywell THP2400A1019 Cover Plate Assembly

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    MSRP: $28.54
    Now: $22.06
    Honeywell THP2400A1019 Cover Plate Assemblyl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $28.54
    Now: $22.06
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    Honeywell THM5421R1021 Interface Module,Redlink/Iaq

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    MSRP: $145.20
    Now: $112.20
    Honeywell THM5421R1021 Interface Module,Redlink/Iaql   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $145.20
    Now: $112.20
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    Honeywell THM5320R1000 Equip Interface Module Wireless

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    MSRP: $272.04
    Now: $210.21
    Honeywell THM5320R1000 Equip Interface Module Wirelessl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $272.04
    Now: $210.21
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    Honeywell THM4000R1000 Wireless Adapter

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    MSRP: $119.96
    Now: $92.69
    Honeywell THM4000R1000 Wireless Adapterl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $119.96
    Now: $92.69
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    Honeywell TH5320R1002 Wireless Multi Stage Non-Prog Thermostat

    Resideo

    MSRP: $283.65
    Now: $219.19
    Honeywell TH5320R1002 Wireless Multi Stage Non-Prog Thermostatl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $283.65
    Now: $219.19
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    Honeywell TH450 120/208/240,Non-Prog.Stat

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    MSRP: $101.44
    Now: $78.39
    Honeywell TH450 120/208/240,Non-Prog.Statl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $101.44
    Now: $78.39
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    Honeywell TH401 120/208/240V Non-Prog Thermostat

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    MSRP: $66.48
    Now: $51.37
    Honeywell TH401 120/208/240V Non-Prog Thermostatl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $66.48
    Now: $51.37
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    Honeywell TH2210DH1000 Pro2000 Prog Dig Thermostat 2Ht/1Cl

    Honeywell

    MSRP: $125.38
    Now: $96.89
    Honeywell TH2210DH1000 Pro2000 Prog Dig Thermostat 2Ht/1Cll  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $125.38
    Now: $96.89
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    Honeywell TH141HC-28-B 1H/1C 7Day Stat For Ct240 Mod.

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    MSRP: $162.89
    Now: $125.87
    Honeywell TH141HC-28-B 1H/1C 7Day Stat For Ct240 Mod.l  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $162.89
    Now: $125.87
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    Honeywell TH140-28-01-B Prog Low/Line Volt Hydronic Thermostat

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    MSRP: $148.66
    Now: $114.88
    Honeywell TH140-28-01-B Prog Low/Line Volt Hydronic Thermostatl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $148.66
    Now: $114.88
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    Honeywell TH1210DV1007 2H/1C Heat Pump Non Prog

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    MSRP: $67.68
    Now: $52.30
    Honeywell TH1210DV1007 2H/1C Heat Pump Non Progl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $67.68
    Now: $52.30
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    Honeywell TH1210DH1001 Pro1000 Non Prog Digital Thermostat

    Honeywell

    MSRP: $103.93
    Now: $80.31
    Honeywell TH1210DH1001 Pro1000 Non Prog Digital Thermostatl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $103.93
    Now: $80.31
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    Honeywell TH115-AF-GA (direct replacement for TH115-AF-240S and TH115-AF-GB) 120/240V 7Day Dpst Elec Ht Stat

    Resideo

    MSRP: $322.06
    Now: $248.87
    Honeywell TH115-AF-GA 120/240V 7Day Dpst Elec Ht Statl This is the direct replacement for TH115-AF-GB and TH115-AF-240S. FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum...
    MSRP: $322.06
    Now: $248.87
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    Honeywell TH115-AF-120S 7D Pro 120V Elec/Floor Heat

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    MSRP: $201.84
    Now: $155.97
    Honeywell TH115-AF-120S 7D Pro 120V Elec/Floor Heatl   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements    
    MSRP: $201.84
    Now: $155.97
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    Honeywell TH115-AF-024T 7D Pro 24V Elec/Floor Heating

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    MSRP: $215.06
    Now: $166.18
    Honeywell TH115-AF-024T 7D Pro 24V Elec/Floor Heatingl  FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $215.06
    Now: $166.18
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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.