LENNOX 100087-11 Furnace High Pressure Switch Actuates 55W64 662551424355 590

( Brand: Lennox ), ( Manufacturer Part Number: 100087-11 ), ( Model: 55W64 ), ( Compatible Brand: For Lennox ), ( Type: Furnace High Pressure Switch ), ( Unit Type: Unit ), ( Power Source: Corded Electric ), ( Country Of Origin: Mexico ), ( California Prop 65 Warning: Yes ), ( UPC: 662551424355 )

Review LENNOX Furnace High Pressure Switch Actuates At 590 Psi Oem

The **Lennox 100087-11 55W64 Furnace High-Pressure Limit Switch** is a critical yet often overlooked component in residential and light-commercial HVAC systems, designed to ensure the safe and efficient operation of gas-fired furnaces by monitoring and controlling the combustion process. This high-pressure switch, part of Lennox s reliable line of furnace controls, is engineered to activate at a precise pressure threshold specifically at **590 inches of water column (WC)** to prevent dangerous conditions such as overheating, excessive pressure buildup, or potential system failure. Positioned strategically within the furnace s combustion chamber or flue system, the switch acts as an automated safeguard, interrupting gas flow or triggering a shutdown if the pressure exceeds safe operational limits. Constructed with durable materials and precision-engineered mechanisms, the **55W64 model** is built to withstand the thermal and mechanical stresses of continuous use while maintaining long-term reliability. Its compact yet robust design ensures seamless integration into Lennox furnaces, where it plays a pivotal role in maintaining optimal combustion efficiency and protecting the system from catastrophic malfunctions. Whether installed in a traditional forced-air furnace or a more advanced variable-speed model, this switch exemplifies Lennox s commitment to performance, safety, and longevity, offering homeowners and technicians alike peace of mind with its fail-safe operation. Proper installation and regular inspection of this component are essential to uphold the furnace s warranty and ensure consistent, trouble-free performance throughout the heating season.

The Lennox 100087-11 55W64 furnace, specifically the high-pressure limit switch (part number 590), is a critical component for maintaining safe and efficient operation. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Lennox 100087-11 55W64 Furnace with High-Pressure Switch (590)**

1. **Reliability and Brand Reputation**

Lennox is a well-established manufacturer known for producing durable and high-quality HVAC equipment. The 55W64 series is part of their commercial-grade lineup, which is designed for longevity and consistent performance in demanding environments. The high-pressure limit switch is a standard safety feature, ensuring the furnace operates within safe pressure limits to prevent overheating or damage.

2. **Compatibility and Fit**

The high-pressure switch (590) is a direct replacement part for the Lennox 55W64 furnace, meaning it will fit seamlessly without requiring modifications. This reduces the risk of installation errors or compatibility issues, which can be common with aftermarket or generic parts.

3. **Safety Features**

The high-pressure switch is a critical safety device that shuts down the furnace if the pressure in the system exceeds safe levels. This prevents potential hazards such as gas leaks, explosions, or damage to the heat exchanger. Having an authentic Lennox part ensures that the safety mechanism functions as intended.

4. **Ease of Installation**

Since this is an OEM (original equipment manufacturer) part, it is designed to be straightforward to install. Technicians familiar with Lennox systems will likely have experience working with this component, reducing the time and complexity of the replacement process.

5. **Warranty Coverage**

If the furnace is still under warranty (either the original manufacturer s warranty or an extended warranty), replacing the high-pressure switch with an OEM part may help maintain warranty eligibility. Aftermarket parts could void warranty coverage, depending on the terms.

6. **Consistency in Performance**

OEM parts are engineered to match the specifications of the original equipment, ensuring that the furnace operates efficiently and consistently. Aftermarket parts may vary in quality, potentially leading to performance inconsistencies or premature failure.

7. **Accessibility of Parts**

Lennox parts are widely available through authorized dealers, distributors, and online retailers. This makes it easier to source the part quickly, especially in cases of emergency repairs.

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### **Cons of buying a Lennox 100087-11 55W64 Furnace with High-Pressure Switch (590)**

1. **Cost**

OEM parts, including the high-pressure switch, are typically more expensive than aftermarket or generic alternatives. The cost may be a significant factor, especially if the furnace is older or if the switch has failed unexpectedly. Prices can vary depending on the supplier, but OEM parts are generally priced higher due to brand reputation and quality assurance.

2. **Potential for Overkill**

If the furnace is older and nearing the end of its lifespan, investing in an OEM high-pressure switch may not be the most cost-effective solution. In such cases, replacing the entire furnace might be more economical in the long run, even if it requires a higher upfront cost.

3. **Limited Customization**

Since this is an OEM part, there is no room for customization or upgrades. If you are looking for enhanced features or modifications, aftermarket parts may offer more options, though with varying levels of reliability.

4. **Dependence on Professional Installation**

While the part itself is easy to install, ensuring that the furnace is serviced correctly afterward may require hiring a professional technician. This adds to the overall cost of the repair.

5. **Potential for Counterfeit Parts**

When purchasing OEM parts online, there is a risk of receiving counterfeit or low-quality replicas, especially from unauthorized sellers. It is crucial to buy from reputable sources to avoid this issue.

6. **Environmental and Disposal Considerations**

If the furnace is being replaced or upgraded, disposing of the old unit may involve additional costs or logistical challenges, depending on local regulations. This is not directly related to the part itself but is worth considering when evaluating the overall cost of ownership.

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### **Conclusion**

The Lennox 100087-11 55W64 furnace s high-pressure switch (590) is a reliable and safe choice for maintaining or repairing a Lennox system. Its OEM status ensures compatibility, durability, and adherence to safety standards, making it an ideal option for those prioritizing quality and longevity. However, the higher cost and potential overkill for older furnaces are valid considerations. If the furnace is still in good condition otherwise, investing in the OEM part is justified. Conversely, if the furnace is outdated or frequently requiring repairs, it may be more prudent to evaluate whether a full replacement is the better long-term solution.

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### **Recommendation**

- The furnace is relatively new or in good condition and requires only this specific part for repair.

- You value reliability, safety, and warranty coverage.

- You are confident in the quality of the supplier to avoid counterfeit parts.

- The cost of the part is justified by the furnace s remaining lifespan and performance.

- The furnace is old and has multiple failing components, making a full replacement more cost-effective.

- You are on a tight budget and are willing to take the risk of using a high-quality aftermarket part (ensure it meets Lennox specifications).

- You are unsure about the furnace s overall condition and would prefer a professional assessment before committing to repairs.

For most cases where the high-pressure switch is the only issue, purchasing the OEM Lennox part is the recommended choice due to its reliability and safety benefits. Always verify the part s authenticity and consult with a HVAC professional to ensure it is the right solution for your specific situation.

Details:

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part #: 10008711 prices

• $24.95-$60.45

specifications hvaapa:

• brand: Lennox
• mpn: 100087-11
• model: 55w64
• compatible brand: For Lennox
• type: Furnace High Pressure Switch
• unit type: Unit
• power source: Corded Electric
• country of origin: Mexico
• california prop 65 warning: Yes
• upc: 662551424355

seller hvaapa:

• rating: 98.3%
• city: Rome, Georgia
• # reviews: 3035

returns hvaapa:

• time: 14 Days
• method: Money back
• policy: Returns Accepted
• paid by: Buyer

shipping hvaapa:

• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• cost: $0.00
• type: Fixed
• transit: 5-10 Days
• carrier: FedEx

general hvaapa:

• condition: Used
• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Controls Circuit Boards

offer hvaapa:

• options: Ship-to-home
• quantity: 1
• started: February 13, 2026
• availability: In Stock
• sold: 0

payments hvaapa:

• credit card: Visa
• other
• wallet: Paypal

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