Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier High Pressure Switch HK02ZA442 for FIOP100B301GA
Carrier

OEM Carrier High Pressure Switch HK02ZA442 for FIOP100B301GA

SKU: CARRIE-FIOP100B301GA-PRESSURE_SWITCH-HK02ZA442 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier High Pressure Switch HK02ZA442 for Model FIOP100B301GA

This OEM high pressure switch (part number HK02ZA442) is the factory-specified replacement for the Carrier FIOP100B301GA packaged unit. The pressure switch is a critical safety device that monitors refrigerant or system pressure to confirm safe operating conditions before allowing the control board to advance through the heating or cooling sequence. When this switch fails or sticks open, the system will typically lock out before ignition, display a pressure switch fault code, or refuse to start despite the thermostat calling for operation.

  • Specs: High pressure switch | OEM part number HK02ZA442 | Factory-calibrated pressure set point | Direct drop-in replacement — no modification required
  • OEM vs Generic: OEM pressure switches are calibrated to exact factory set-point tolerances. Aftermarket substitutes can drift out of spec, causing nuisance lockouts or, worse, failing to protect against genuine over-pressure conditions — a safety risk not worth taking.
  • Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, and a multimeter to verify continuity after installation. Always label and photograph existing wiring before disconnecting leads.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier FIOP100B301GA packaged unit. Verify the OEM part number HK02ZA442 against your unit's data plate or existing switch before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. 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 FIOP100B301GA?
Yes. This is the factory-specified OEM pressure switch for the Carrier FIOP100B301GA. 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 FIOP100B301GA?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online