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OEM Carrier Low Pressure Switch 312926-258 for CH14NB04800GAAAA
Carrier

OEM Carrier Low Pressure Switch 312926-258 for CH14NB04800GAAAA

SKU: CARRIE-CH14NB04800GAAAA-PRESSURE_SWITCH-312926-258 Brand: Carrier

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OEM Carrier Low Pressure Switch 312926-258 for Model CH14NB04800GAAAA

This OEM low pressure switch (part number 312926-258) is the factory-specified replacement for the Carrier CH14NB04800GAAAA condensing unit. The pressure switch is a critical safety device that monitors the operation of the inducer motor by sensing negative air pressure in the flue system. When the inducer reaches the correct speed and draft, the pressure switch closes, signaling the control board to proceed with the ignition sequence. A failed or stuck-open pressure switch will prevent the system from advancing past the inducer stage, resulting in a no-heat lockout condition. Common symptoms include the inducer running continuously with no ignition, or a blinking fault code on the control board indicating a pressure switch failure.

  • Specs: Low pressure switch | OEM part number 312926-258 | Factory-calibrated W.C. (water column) rating | Designed to exact Carrier specifications for the CH14NB04800GAAAA platform
  • OEM vs Generic: This OEM pressure switch is precision-calibrated to the exact W.C. rating required by your unit. Generic replacements frequently use looser trip-point tolerances, risking nuisance lockouts or — more dangerously — failure to detect a true flue blockage.
  • Install difficulty: 2/5 — Shut off power and gas before beginning. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter to verify switch continuity before installation. Inspect the rubber hose and port for cracks or blockage while the switch is removed, as a cracked hose is a common root cause of switch failure.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier CH14NB04800GAAAA condensing unit using OEM part number 312926-258. Always verify your existing part number on the switch body or equipment data plate before ordering to confirm fitment. Not sure? Our HVAC parts specialists verify compatibility before you buy — contact us anytime. In stock and 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 info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Pressure Switch fit my Carrier CH14NB04800GAAAA?
Yes. This is the factory-specified OEM pressure switch for the Carrier CH14NB04800GAAAA. 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 CH14NB04800GAAAA?
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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Mike Rivera
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