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Lennox

OEM Lennox Pressure Switch with Bracket — 11U64

SKU: LNX-11U64 Brand: Lennox
$24.95 $34.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The genuine OEM Lennox 11U64 pressure switch with mounting bracket is a critical safety control that verifies proper airflow and venting before allowing the ignition or operating sequence to proceed on your Lennox equipment. It monitors pressure differential and prevents the system from firing under unsafe conditions, protecting both the equipment and your home. The included bracket ensures the switch is mounted at the correct position and orientation for accurate readings.

When a pressure switch fails or drifts out of calibration, you may experience a furnace that ignites and then shuts down, a system that will not start at all, repeated lockouts, or fault codes indicating a pressure switch error. Blocked hoses, a stuck diaphragm, or a switch that no longer closes at the rated point are the most common culprits.

The OEM 11U64 is calibrated to the precise pressure setpoint specified for your Lennox system, so it trips at exactly the right threshold. Generic substitutes with the wrong setpoint can cause nuisance shutdowns or, worse, fail to protect the unit. Restore safe, reliable operation with the correct factory part and bracket.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Pressure Switch fit my Lennox OEM Lennox Pressure Switch with Bracket — 11U64?
Yes. This is the factory-specified OEM pressure switch for the Lennox OEM Lennox Pressure Switch with Bracket — 11U64. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the pressure switch on my Lennox OEM Lennox Pressure Switch with Bracket — 11U64?
Difficulty: Medium (20–30 min)
Step 1: Turn off power. Step 2: Locate pressure switch near draft inducer. Step 3: Note tubing orientation. Step 4: Disconnect tubing and wires. Step 5: Remove screw, install new switch. Step 6: Reconnect tubing and wires, restore power.
My furnace shows a pressure switch error. What do I replace?
Furnace LED showing pressure switch error = switch not detecting draft inducer airflow. Try first: clear the rubber tubing to the switch (often clogged with condensation). If problem persists, replace the pressure switch.
Is this pressure switch compatible with Bryant or Payne too?
Many Lennox parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Lennox pressure switch?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
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