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OEM Payne Pressure Switch High/Low for PA12NA03600GAAAA
Payne

OEM Payne Pressure Switch High/Low for PA12NA03600GAAAA

SKU: PAYNE-PA12NA03600GAAAA-PRESSURE_SWITCH-HK02ZA395 Brand: Payne

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Payne High & Low Pressure Switch for Model PA12NA03600GAAAA

These OEM pressure switches — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — are the factory-specified replacements for the Payne PA12NA03600GAAAA heat pump system. Pressure switches monitor refrigerant-side pressures to protect the compressor and refrigerant circuit from operating outside safe limits. When either switch fails or trips, the system will lock out, refuse to start, or cycle off unexpectedly — often displaying a fault code related to high- or low-pressure protection.

  • Specs: HK02ZA395 — High Pressure Switch, factory-calibrated cutout set point | HK02ZB028 — Low Pressure Switch, factory-calibrated cutout set point | Both designed for R-410A refrigerant systems | OEM-matched electrical connectors for direct plug-in replacement
  • OEM vs Generic: OEM pressure switches are factory-calibrated to exact trip and reset pressures for the PA12NA03600GAAAA. Generic substitutes frequently use off-spec set points that can allow compressor damage or cause nuisance lockouts, shortening system life.
  • Install difficulty: 3/5 — Refrigerant-side work should only be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, multimeter, flathead and Phillips screwdrivers, adjustable wrench. Always recover refrigerant per EPA regulations before replacing pressure switches in the refrigerant circuit.
  • Warranty: 1-year OEM factory warranty on both switches. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: Designed specifically for the Payne PA12NA03600GAAAA heat pump condenser. Confirm OEM part numbers HK02ZA395 and HK02ZB028 against your unit's wiring diagram or data plate before ordering. Our fitment specialists are available to verify compatibility — contact us before you order if you have any questions.

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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Pressure Switch fit my Payne PA12NA03600GAAAA?
Yes. This is the factory-specified OEM pressure switch for the Payne PA12NA03600GAAAA. 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 Payne PA12NA03600GAAAA?
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 Payne 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 Payne 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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