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OEM Carrier High Pressure Switch HK02ZA442 for FIOP300511GA
Carrier

OEM Carrier High Pressure Switch HK02ZA442 for FIOP300511GA

SKU: CARRIE-FIOP300511GA-PRESSURE_SWITCH-HK02ZA442 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier High Pressure Switch HK02ZA442 for Model FIOP300511GA

This is the factory OEM high pressure switch (part number HK02ZA442) for the Carrier FIOP300511GA unit. The pressure switch monitors the inducer motor's ability to create the correct negative pressure (draft) inside the heat exchanger before allowing the ignition sequence to proceed. If the switch fails to close — or fails to open when it should — the control board will lock out the system, preventing heating. Common symptoms include the inducer running but the system never advancing to ignition, a flashing fault code indicating a pressure switch fault, or intermittent no-heat calls that reset after a power cycle.

  • Specs: High pressure switch configuration | OEM water column (W.C.) rating factory-matched to Carrier FIOP300511GA | Single-port design | Spade terminal connections | Replaces OEM part number HK02ZA442
  • OEM vs Generic: This is a genuine OEM Carrier component manufactured to exact W.C. trip-point specifications. Aftermarket pressure switches often carry wider tolerances, which can cause nuisance lockouts or — more dangerously — fail to detect a true blocked flue condition, creating a safety hazard.
  • Install Difficulty: 2/5 — Power down the unit at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a manometer to verify W.C. rating if troubleshooting further. Inspect the rubber hose port for cracks or blockage before replacing the switch, as a clogged hose is a common root cause of pressure switch faults.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier FIOP300511GA. Always confirm the OEM part number HK02ZA442 against the label on your existing switch and verify the unit's data plate before ordering. Our parts specialists are available to confirm fitment — just reach out before you order. In stock and ready to ship today.

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 Carrier FIOP300511GA?
Yes. This is the factory-specified OEM pressure switch for the Carrier FIOP300511GA. 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 Carrier FIOP300511GA?
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 Carrier 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 Carrier 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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