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Lennox 14A53 2-Stage Pressure Switch 0.40"/0.70" WC

Special Price $70.27 Regular Price $80.81
In stock
SKU
14A53
The Lennox 14A53 Pressure Switch is a safety device that is manufactured to be used exclusively in Lennox HVAC systems. This two-stage pressure switch 2-stage helps in safe and efficient running of the system by measuring pressure of air within the system. It has two fixed pressure points to control pressure and avoid breakdowns a high pressure point of 0.70 IWCP and a low pressure point of 0.40 IWCP. If the air pressure goes beyond these parameters it activates electrical controls to regulate and maintain safe pressure levels. The switch has Single Pole, Normally Open SPST-NO contact arrangement and has the capacity to control up to 5A Resistive at 24 VAC.
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Specifications

  • Measure: EACH
  • Type of Product: 2-Stage Pressure Switch
  • Pressure Settings: Set Point High 0.70 Inch WC, Set Point Low 0.40 Inch WC
  • Contact Rating: 5 Amp Resistive at 24 VAC
  • Configuration: SPST-NO Contact
  • Weight: 0.58lbs
Manufacturer Name: Lennox
Product Number: 14A53
OEM Part Number: 14A53
Product Description: .40/.70 2 Stage Pressureswitch
Weight:0.58lbs/263.08g

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Customer Questions
What maintenance is required for the Lennox 14A53 Pressure Switch?

Inspect sensing tubes and ports for blockage or moisture and ensure tight connections. Clean gently and check electrical contacts for corrosion or looseness. Verify diaphragm response and mounting stability with power off for safety.

What are common issues with the Lennox 14A53 2-Stage Pressure Switch?

  • Blocked or cracked sensing tubing causing false pressure readings.
  • Diaphragm failure leading to intermittent switching or no response.
  • Electrical contact wear causing inconsistent operation or short cycling.
  • Pressure setpoint drift resulting in improper stage activation.

Installation Steps

Step 1: Turn off power and gas supply to system.

Step 2: Remove existing switch and label tubing connections.

Step 3: Mount new switch in original position securely.

Step 4: Attach pressure tubing to correct ports without kinks.

Step 5: Connect electrical terminals as per wiring diagram.

Step 6: Tighten fittings evenly and check sealing.

Step 7: Restore power and test pressure response stages.