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Thermostats / Sensors

Thermostats / Sensors

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    PRO 1 IAQ T725 ProgStat 2H/1CHtpmp,1H/1C Conv

    PRO 1 IAQ

    MSRP: $91.94
    Now: $71.04
    PRO 1 IAQ T725 ProgStat 2H/1CHtpmp,1H/1C Conv 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: $91.94
    Now: $71.04
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    PRO 1 IAQ T721I WIFI 7D,5+1+1orNonProgTstat

    PRO 1 IAQ

    MSRP: $140.48
    Now: $108.55
    PRO 1 IAQ T721I WIFI 7D,5+1+1orNonProgTstat 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: $140.48
    Now: $108.55
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    PRO 1 IAQ T701 1H/1C NonProgStat 4" Display

    PRO 1 IAQ

    MSRP: $60.08
    Now: $46.42
    PRO 1 IAQ T701 1H/1C NonProgStat 4" Display 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: $60.08
    Now: $46.42
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    PRO 1 IAQ T150 Universal TStat Guard

    PRO 1 IAQ

    MSRP: $34.30
    Now: $26.51
    PRO 1 IAQ T150 Universal TStat Guard 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: $34.30
    Now: $26.51
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    PRO 1 IAQ T621-2 NonProgStat 2H/1C HP or 1H/1C

    PRO 1 IAQ

    MSRP: $66.00
    Now: $50.00
    PRO 1 IAQ T621-2 NonProgStat 2H/1C HP or 1H/1C 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: $66.00
    Now: $50.00
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    PRO 1 IAQ T605-2 ProgTstat 1H/1C,7Day or 5-1-1

    PRO 1 IAQ

    MSRP: $52.77
    Now: $40.77
    PRO 1 IAQ T605-2 ProgTstat 1H/1C,7Day or 5-1-1 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: $52.77
    Now: $40.77
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    PRO 1 IAQ T601-2 Tstat 1/H-1/C Non-Prog

    PRO 1 IAQ

    MSRP: $40.59
    Now: $31.36
    PRO 1 IAQ T601-2 Tstat 1/H-1/C Non-Prog 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: $40.59
    Now: $31.36
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    PRO 1 IAQ T755WHO Wireless Universal Thermostat

    PRO 1 IAQ

    MSRP: $237.47
    Now: $183.50
    PRO 1 IAQ T755WHO Wireless Universal 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: $237.47
    Now: $183.50
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    PRO 1 IAQ T855ISH WIFIstat 7D/5-1-1/NonProg4H/2C

    PRO 1 IAQ

    MSRP: $221.51
    Now: $171.17
    PRO 1 IAQ T855ISH WIFIstat 7D/5-1-1/NonProg4H/2C 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: $221.51
    Now: $171.17
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    Siemens Building Technology 192-257W STAT CVR CON/CON/CON NO LOGO

    Siemens Building Technology

    MSRP: $23.23
    Now: $17.95
    Siemens Building Technology 192-257W STAT CVR CON/CON/CON 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: $23.23
    Now: $17.95
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    Siemens Building Technology 192-842W WHITE TSTAT MTG ADAPTER KIT

    Siemens Building Technology

    MSRP: $36.43
    Now: $27.60
    Siemens Building Technology 192-842W WHITE TSTAT MTG ADAPTER KIT 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: $36.43
    Now: $27.60
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    Siemens Building Technology 544-577-60 Immersion Temperature Sensor

    Siemens Building Technology

    MSRP: $129.95
    Now: $100.42
    Siemens Building Technology 544-577 Immersion Temperature Sensor Pt RTD 1k Ohm 375a Output Signal 0 Degree - 250 Degree Fahrenheit (-18 Degree - 121 Degree Celsius) Temperature 6 inches (thermowell included) Probe Length Connection Type: Leads, No...
    MSRP: $129.95
    Now: $100.42
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    Peco Controls TB155-048 ElecTstat AutoC/O 3spdFanOnOff

    Peco Controls

    MSRP: $148.99
    Now: $115.13
    Peco Controls TB155-048 ElecTstat AutoC/O 3spdFanOnOff 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: $148.99
    Now: $115.13
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    Peco Controls TA155-046 ElecTstat ManC/O 3spFanHtClOff

    Peco Controls

    MSRP: $132.87
    Now: $102.68
    Peco Controls TA155-046 ElecTstat ManC/O 3spFanHtClOff 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: $132.87
    Now: $102.68
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    Peco Controls T8168-1 DigitalThermostatSetBack3SpdFn

    Peco Controls

    MSRP: $207.24
    Now: $160.14
    Peco Controls T8168-1 DigitalThermostatSetBack3SpdFn 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: $207.24
    Now: $160.14
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    Peco Controls SP155-011 ADJUSTABLE DUAL ZONE TEMP STAT

    Peco Controls

    MSRP: $70.01
    Now: $54.10
    Peco Controls SP155-011 ADJUSTABLE DUAL ZONE TEMP STAT 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: $70.01
    Now: $54.10
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    Peco Controls TA155-017 On/Off 24-277v 3spd Vert. Stat

    Peco Controls

    MSRP: $154.67
    Now: $119.52
    Peco Controls TA155-017 On/Off 24-277v 3spd Vert. Stat 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: $154.67
    Now: $119.52
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    Peco Controls TA155-018 24-277v SPDT WarmCool Tstat

    Peco Controls

    MSRP: $96.86
    Now: $74.84
    Peco Controls TA155-018 24-277v SPDT WarmCool Tstat 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: $96.86
    Now: $74.84
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    Peco Controls TF115P-002 40-110F SPDT COIL TSTAT NEMA4X

    Peco Controls

    MSRP: $93.21
    Now: $72.02
    Peco Controls TF115P-002 40-110F SPDT COIL TSTAT NEMA4X 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: $93.21
    Now: $72.02
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    Peco Controls T4522-001 2H/2C Programmable T-Stat

    Peco Controls

    MSRP: $147.63
    Now: $114.07
    Peco Controls T4522-001 2H/2C Programmable T-Stat 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: $147.63
    Now: $114.07
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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.