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OEM Payne Pressure Switch High/Low for PA10JA04800GACAA
Payne

OEM Payne Pressure Switch High/Low for PA10JA04800GACAA

SKU: PAYNE-PA10JA04800GACAA-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 PA10JA04800GACAA

These OEM pressure switches — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — are the factory-specified replacements for the Payne PA10JA04800GACAA packaged air conditioning unit. Pressure switches monitor refrigerant-side pressures to protect the compressor from operating outside safe high- and low-pressure thresholds. When either switch fails or trips, the system will lock out, preventing startup and triggering a fault code on the control board. Common symptoms include a compressor that won't start, repeated short-cycling, or a system that powers on but never produces conditioned air.

  • Specs: HK02ZA395 — High Pressure Switch, factory-calibrated cut-out setpoint | HK02ZB028 — Low Pressure Switch, factory-calibrated cut-in setpoint | Both rated for R-410A refrigerant systems | Spade terminal connections for direct OEM harness fitment
  • OEM vs Generic: OEM pressure switches are precision-set at the factory to exact cut-in and cut-out pressures. Aftermarket switches frequently carry wider pressure tolerances, risking nuisance trips or, worse, insufficient compressor protection that can lead to costly refrigerant-side failures.
  • Install difficulty: 3/5 — Refrigerant pressure switches require safely recovering or isolating system pressure before replacement. Tools needed: refrigerant manifold gauge set, adjustable wrench, flathead screwdriver, multimeter for continuity verification. Always follow EPA Section 608 refrigerant handling regulations. Recommended for qualified HVAC technicians.
  • Warranty: 1-year OEM factory warranty on both HK02ZA395 and HK02ZB028. In-stock units ship the same business day from our warehouse.

Compatibility: Designed specifically for the Payne PA10JA04800GACAA 4-ton packaged air conditioning unit operating on R-410A refrigerant. Verify part numbers HK02ZA395 and HK02ZB028 against your unit's wiring diagram and data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — order with confidence and get same-day shipping on in-stock OEM parts.

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 PA10JA04800GACAA?
Yes. This is the factory-specified OEM pressure switch for the Payne PA10JA04800GACAA. 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 PA10JA04800GACAA?
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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