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OEM Payne Pressure Switch High & Low for PA10PA036000AGAA
Payne

OEM Payne Pressure Switch High & Low for PA10PA036000AGAA

SKU: PAYNE-PA10PA036000AGAA-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 PA10PA036000AGAA

These OEM pressure switches are the factory-specified replacements for the Payne PA10PA036000AGAA packaged air conditioning unit. The pressure switch monitors refrigerant pressures in the system — the high-pressure switch (HK02ZA395) protects against dangerously elevated discharge pressure, while the low-pressure switch (HK02ZB028) guards against low suction pressure caused by refrigerant loss or restricted airflow. When either switch fails or trips, the system will lock out, preventing compressor operation and triggering a fault code on the control board. Common symptoms include the system refusing to start, short-cycling, or displaying a pressure fault with no obvious refrigerant leak.

  • Specs: High Pressure Switch — OEM Part HK02ZA395 | Low Pressure Switch — OEM Part HK02ZB028 | Factory-calibrated trip points matched to R-410A operating pressures | Spade terminal connections for direct plug-in replacement
  • OEM vs Generic: OEM pressure switches are calibrated to exact factory trip and reset pressures for the PA10PA036000AGAA. Generic alternatives may use wider pressure tolerances, risking nuisance trips or — worse — failing to protect the compressor from damaging pressure extremes.
  • Install Difficulty: 3/5 — Refrigerant pressure is present in the system; always recover refrigerant per EPA 608 regulations before disconnecting pressure switch lines if attached to the refrigerant circuit. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify continuity before reinstalling panels.
  • Warranty: 1-year OEM factory warranty. Orders placed by 3 PM ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Payne PA10PA036000AGAA 3-ton packaged air conditioning unit. Verify which switch — high (HK02ZA395) or low (HK02ZB028) — is required by checking your system's fault code and referencing the unit's wiring diagram inside the access panel. Not sure which one you need? Our HVAC parts specialists will confirm fitment before you order — no guesswork required.

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 PA10PA036000AGAA?
Yes. This is the factory-specified OEM pressure switch for the Payne PA10PA036000AGAA. 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 PA10PA036000AGAA?
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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