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OEM Payne Pressure Switch High/Low for PA10JA04800MACAA
Payne

OEM Payne Pressure Switch High/Low for PA10JA04800MACAA

SKU: PAYNE-PA10JA04800MACAA-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 PA10JA04800MACAA

These OEM pressure switches are the factory-specified replacements for the Payne PA10JA04800MACAA packaged air conditioning unit. The pressure switches — HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) — monitor refrigerant circuit pressures and send a signal to the control board to allow or interrupt system operation. When either switch fails or sticks open, the system will typically lock out before completing a cooling cycle, trigger a fault code, or refuse to start altogether. A failed high-pressure switch may cause nuisance trips on hot days, while a failed low-pressure switch often points to refrigerant loss or an evaporator freeze condition.

  • Specs: HK02ZA395 — High Pressure Switch, factory-calibrated cutout pressure | HK02ZB028 — Low Pressure Switch, factory-calibrated cutout pressure | OEM-matched electrical connectors for direct plug-in replacement | Rated for R-410A refrigerant systems
  • OEM vs Generic: OEM pressure switches are factory-calibrated to the exact cutout and reset pressures specified for the PA10JA04800MACAA. Generic switches often carry wider pressure tolerances, which can cause nuisance trips, missed fault conditions, or accelerated compressor wear over time.
  • Install difficulty: 3/5 — Refrigerant circuit work requires EPA 608 certification. Tools needed: manifold gauge set, multimeter, adjustable wrench, and safety glasses. Always recover refrigerant per EPA regulations before replacing switches on the high- or low-side lines. Verify system pressures after reinstallation.
  • Warranty: 1-year OEM factory warranty on both HK02ZA395 and HK02ZB028. Orders placed by 3 PM ship same business day from our warehouse.

Compatibility: Engineered specifically for the Payne PA10JA04800MACAA packaged air conditioner (4-ton, R-410A). Confirm your existing switch part numbers — HK02ZA395 or HK02ZB028 — against your unit's data plate or wiring diagram before ordering. Need fitment verification? Our HVAC parts specialists confirm compatibility before you buy. In stock — ships 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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Pressure Switch fit my Payne PA10JA04800MACAA?
Yes. This is the factory-specified OEM pressure switch for the Payne PA10JA04800MACAA. 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 PA10JA04800MACAA?
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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