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OEM Carrier Pressure Switch High/Low for CH14NB03600GABAA
Carrier

OEM Carrier Pressure Switch High/Low for CH14NB03600GABAA

SKU: CARRIE-CH14NB03600GABAA-PRESSURE_SWITCH-312926-252 Brand: Carrier
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OEM Carrier High & Low Pressure Switch for Model CH14NB03600GABAA

These OEM pressure switches — 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH14NB03600GABAA split-system heat pump. Pressure switches monitor the inducer motor's draft pressure to confirm safe venting conditions before the control board allows ignition to proceed. When either switch fails or sticks open, the system locks out before heating begins, leaving you with a blinking fault code and no heat output.

  • Specs: 312926-252 — High Pressure Switch | 312926-258 — Low Pressure Switch | Rated water column (W.C.) calibrated to factory spec | SPST normally-open configuration | 1/4" Molex quick-connect terminals
  • OEM vs Generic: OEM pressure switches are factory-calibrated to exact W.C. trip points for this model. Aftermarket substitutes frequently carry wider tolerances, causing nuisance lockouts or — more dangerously — failing to detect a true venting fault. OEM is strongly recommended for pressure switches.
  • Install difficulty: 2/5 — Power off and confirm zero voltage at the control board before starting. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (for verification), and needle-nose pliers. Photograph all hose and wire connections before disconnecting. Swap one switch at a time to simplify diagnosis.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier CH14NB03600GABAA split-system heat pump. Always cross-reference the part number printed on the original switch before ordering — the high-pressure (312926-252) and low-pressure (312926-258) switches are not interchangeable. Verify hose port size and terminal configuration match your existing unit. Our fitment team is available to confirm compatibility before you order.

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 $99
  • 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 CH14NB03600GABAA?
Yes. This is the factory-specified OEM pressure switch for the Carrier CH14NB03600GABAA. 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 CH14NB03600GABAA?
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.
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