MPL Furnace Air Pressure Switch 42-24387-02 MPL-9300-V-0.40-DEACT-N/O-VS

( Brand: Mpl ), ( Model: 42-24387-02 ), ( Part Type: Air Pressure Furnace Switch ), ( Manufacturer Part Number: MPL-9300-V-0.40-DEACT-N/O-VS ), ( Country Of Origin: Costa Rica )

Review MPL Mpl-9300-v-0.40-deact-n/o-vs Furnace Air Pressure Switch

The MPL MPL-9300-V-0.40-DEACT-N/O-VS 42-24387-02 furnace air pressure switch is a crucial component in maintaining the safe and efficient operation of your home heating system. This switch, manufactured by Honeywell, is designed to monitor the air pressure within your furnace and prevent the unit from operating when unsafe conditions are detected.

The MPL-9300-V-0.40-DEACT-N/O-VS switch is a vacuum diaphragm type, which means it utilizes a diaphragm to sense changes in air pressure. It is rated for a voltage range of 24V AC and comes with a voltage rating of 0.40 Amps. The switch is designed to be deactivated (NO) when the desired air pressure is detected, ensuring the furnace does not continue to operate under unsafe conditions.

This pressure switch features a robust, industrial-grade design with a corrosion-resistant housing to withstand the harsh conditions often found in heating systems. It is also equipped with a test point for easy field testing, allowing you to ensure the switch is functioning properly without the need for extensive diagnostic equipment.

The MPL-9300-V-0.40-DEACT-N/O-VS 42-24387-02 furnace air pressure switch is an essential addition to any heating system, providing an extra layer of safety and protection for your home and family. Its reliable performance and durable construction make it an ideal choice for both residential and commercial applications.

When installing this switch, it is important to adhere to the instructions provided in the installation manual to ensure proper wiring and setup. If you are unsure about any aspect of the installation process, it is recommended that you consult with a qualified HVAC technician to ensure the safe and efficient operation of your heating system.

In summary, the MPL MPL-9300-V-0.40-DEACT-N/O-VS 42-24387-02 furnace air pressure switch is a vital component in maintaining the safety and efficiency of your home heating system. Its vacuum diaphragm design, industrial-grade construction, and easy-to-test features make it a reliable and effective solution for monitoring furnace air pressure and preventing unsafe operation.

Comparison of MPL MPL-9300-V-0.40-DEACT-N/O and Honeywell 42-24387-02 Furnace Air Pressure Switches

- This switch is designed for use with Millervac furnaces, ensuring a perfect fit.

- It has a deactivated normally open (NO) contact, which can save energy by preventing the furnace fan from running when the furnace is not calling for heat.

- The pressure switch comes with a factory-set pressure of 0.40 inches of water column, making it easy to install and use.

- The switch is designed to last longer due to its heavy-duty construction.

- It is specifically designed for Millervac furnaces, which may limit its availability and compatibility with other brands.

- The price might be slightly higher compared to some other options on the market due to its brand specificity.

- This switch is universally compatible with various brands and models of furnaces.

- It has a normally open (NO) contact, which allows the furnace fan to run only when the furnace is calling for heat, saving energy.

- The switch is easy to install and comes with a factory-set pressure of 0.40 inches of water column.

- The price is generally more affordable compared to the MPL MPL-9300-V-0.40-DEACT-N/O switch.

- Since it is a universal switch, it may not fit as securely or function as optimally on specific brands or models as a manufacturer-specific switch would.

- It does not have a deactivated NO contact, meaning the fan might run even when the furnace is not calling for heat.

Both the MPL MPL-9300-V-0.40-DEACT-N/O and Honeywell 42-24387-02 furnace air pressure switches have their unique advantages and disadvantages. The MPL switch offers a perfect fit for Millervac furnaces, a longer-lasting design, and an energy-saving deactivated NO contact. In contrast, the Honeywell switch is more affordable and universally compatible, which makes it a more versatile option for various furnace brands and models.

If you own a Millervac furnace, we recommend purchasing the MPL MPL-9300-V-0.40-DEACT-N/O furnace air pressure switch for its optimal fit, longer lifespan, and energy-saving features. However, if you have a furnace from a different brand or if cost is a concern, the Honeywell 42-24387-02 furnace air pressure switch is a reliable and cost-effective alternative.

Details:

Removed from a working unit. There is NO WARRANTY on used parts. Please see pictures for more details. MPL 42-24387-02 Furnace Air Pressure Switch MPL-9300-V-0.40-DEACT-N/O-VS.

By purchasing used parts, you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. Fully tested and guaranteed to work.

part #: 422438702 price

• $65.58

specifications aerationaura:

• brand: Mpl
• model#: 42-24387-02
• part type: Air Pressure Furnace Switch
• manufacturer part number: MPL-9300-V-0.40-DEACT-N/O-VS
• country of origin: Costa Rica

general aerationaura:

• Home Improvement > Heating, Cooling Air > Other Heating, Cooling Air
• condition: Used

shipping aerationaura:

• class: Standard
• type: Calculated
• service: USPS Ground Advantage
• cost: $0.00
• carrier: USPS
• transit: 4-8 Days

offer aerationaura:

• options: Ship-to-home
• quantity: 1
• started: December 22, 2025
• sold: 0
• availability: In Stock
• best offers: True

returns aerationaura:

• paid by: Seller
• policy: Returns Accepted
• method: Money back
• time: 30 Days

seller aerationaura:

• # reviews: 2250
• rating: 100.0%
• city: Arlington height, Illinois

payments aerationaura:

• other
• wallet: Google-pay
• credit card: Visa

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