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    Carrier HH19ZA955 100-155F Auto Limit Switch

    Carrier

    MSRP: $18.03
    Now: $13.66
    100-155F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $18.03
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    Carrier HH19ZA940 85-140F Auto Limit Switch

    Carrier

    MSRP: $51.30
    Now: $38.86
    85-140F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $51.30
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    Carrier HH19ZA930 L130-40F Limit Switch

    Carrier

    MSRP: $30.94
    Now: $23.44
    L130-40F Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $30.94
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    Carrier HH19ZA220 Limit Switch (Obsolete/Discontinued)

    Carrier

    MSRP: $13.94
    Now: $10.77
    PART HAS BEEN DISCONTINUED - Please Call 1-866-620-8417 For Availability or ReplacementCarrier HH19ZA220 Limit Switch (Obsolete/Discontinued) We're sorry--this item is no longer available.
    MSRP: $13.94
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    Carrier HH19ZA195 Limit Switch Opn195 Cls155

    Carrier

    MSRP: $28.84
    Now: $21.85
    Limit Switch Opn195 Cls155   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $28.84
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    Carrier HH19ZA190 Carrier Limit

    Carrier

    MSRP: $25.95
    Now: $19.66
    Carrier Limit   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $25.95
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    Carrier HH19ZA180 Limit Switch

    Carrier

    MSRP: $5.38
    Now: $4.08
    Carrier HH19ZA180 Limit Switch Item is Non-Cancelable / Non-Returnable  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: $5.38
    Now: $4.08
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    Carrier HH19ZA175 Limit Switch Opn175 Cls135

    Carrier

    MSRP: $76.64
    Now: $58.06
    Limit Switch Opn175 Cls135   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $76.64
    Now: $58.06
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    Carrier HH19ZA170 Temperature Switch Primary Limit

    Carrier

    MSRP: $53.92
    Now: $40.85
    Temperature Switch Primary Limit   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $53.92
    Now: $40.85
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    Carrier HH19ZA165 Limit Switch Opn165 Cls125

    Carrier

    MSRP: $52.35
    Now: $39.66
    Limit Switch Opn165 Cls125   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $52.35
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    Carrier HH19ZA156 Limit Switch

    Carrier

    MSRP: $45.61
    Now: $34.55
    Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - Everytime No Minimum Order Requirements      
    MSRP: $45.61
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    Carrier HH19ZA155 Limit Switch

    Carrier

    MSRP: $52.21
    Now: $39.55
    Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $52.21
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    Carrier HH19ZA145 Limit Switch Opn145 Cls105

    Carrier

    MSRP: $45.01
    Now: $34.10
    Limit Switch Opn145 Cls105   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $45.01
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    Carrier HH19ZA140 100-140F Auto Limit Switch

    Carrier

    MSRP: $38.51
    Now: $29.18
    100-140F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $38.51
    Now: $29.18
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    Carrier HH19ZA135 L135-40F Limit Switch

    Carrier

    MSRP: $26.10
    Now: $19.78
    L135-40F Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $26.10
    Now: $19.78
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    Carrier HH18SA261 Defrost Temperature Switch

    Carrier

    MSRP: $26.45
    Now: $20.04
    Defrost Temperature Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $26.45
    Now: $20.04
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    Carrier HH18HV185 155-185F Auto Limit Switch

    Carrier

    MSRP: $69.73
    Now: $52.83
    155-185F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $69.73
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    Carrier HH18HV170 142-170F Auto Limit Switch

    Carrier

    MSRP: $78.19
    Now: $59.24
    142-170F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $78.19
    Now: $59.24
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    Carrier HH18HV160 157-160F Auto Limit Switch

    Carrier

    MSRP: $47.73
    Now: $36.16
    157-160F Auto Limit Switch   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $47.73
    Now: $36.16
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    MSRP: $47.73
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    Carrier HH18HV155 Temperature Switch, 155 Degree

    Carrier

    MSRP: $72.62
    Now: $55.01
    Temperature Switch, 155 Degree   FurnacePartSource.com Commitment Item Typically Ships Within the Same Business Day Brand-New Genuine Parts - EverytimeNo Minimum Order Requirements
    MSRP: $72.62
    Now: $55.01
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    MSRP: $72.62
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HVAC Replacement Switches

Without switches, your furnace or air conditioner would simply run non-stop without any method of controlling it. Furnace switches provide a useful service by regulating pressure and power to different modules, which in turn allow your equipment to work in the way that you expect.

Though it can be somewhat of a challenge to find the appropriate switch for any given use case, it can help to locate the brand name and re-order or part number if applicable. While dimensions are provided for each switch in question, the catalog numbers are more than sufficient for finding the correct component in the vast majority of situations.

Pressure Switches

Pressure levels aren’t something to fool around with, considering that excessive pressure measurements could potentially cause a line rupture or other malady. Simply installing a new York Controls limit switch might be enough to slash the possibility of this happening. Take a few moments to check your entire HVAC installation and locate any places where you might be better off with having added a few additional switches like this.

Though you might think that such a simple component is more or less static, nothing could be further from the truth. Updated Lochinvar & A.O. Smith switches are an excellent representation of what new switch technologies are doing to revitalize the industry.

Engineering teams are constantly working on new solutions in this space. While it might not always be obvious and most innovations are incremental at this point, newer switches often boast better build quality and a greater degree of safety as a result of over-engineered points.

Depending on the type of application you’re installing this equipment on, you might find that these designs are considerably more durable than anything you previously used. That’s excellent news for commercial and retail operators in particular since mission-critical operations are quite common in those spaces.

Roll Out Switches

Usually, roll-out switches are found on gas furnaces and they’re used as a safety device. If a gas flame suddenly goes out, then the roll-out switch turns the gas off so that you can’t have a sudden ignition later on. They’re extremely important for this reason, and many jurisdictions require their installation for safety reasons.

Fortunately, there are options from brands like Utica-Dunkirk that can help to dramatically reduce the risk of any accident caused by a flame suddenly going out. All of these roll-out switches are designed to meet or exceed the specifications provided by manufacturers for any piece of equipment that could potentially mount one. As a result, the installation of one could potentially prove to be an upgrade.

Match The Right Switches To Your HVAC System With Furnace Part Source

Traditionally, it can be difficult to match the exact switches needed for a project because of the wide variety. That’s why our team here at Furnace Part Source has put together such a comprehensive collection of switches. They should serve the needs of the greatest number of clients.

Those who run into a snag finding the right safety feature can always use our online contact form. Furnace Part Source will supply HVAC technicians with the necessary components for air conditioning or furnace repair.