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OEM Carrier Pressure Switch High/Low for CH14NA02400GAAAA
Carrier

OEM Carrier Pressure Switch High/Low for CH14NA02400GAAAA

SKU: CARRIE-CH14NA02400GAAAA-PRESSURE_SWITCH-312926-252 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier High & Low Pressure Switch for Model CH14NA02400GAAAA

These OEM pressure switches — part numbers 312926-252 (High Pressure Switch) and 312926-258 (Low Pressure Switch) — are the factory-specified replacements for the Carrier CH14NA02400GAAAA condensing unit. Pressure switches prove that the inducer motor is creating adequate draft before allowing the ignition sequence to proceed. When either switch fails or sticks open, the control board locks out the system before a single ignition attempt is made, leaving you with no heat and typically a diagnostic fault code pointing to inducer or draft proving failure.

  • Specs: 312926-252 — High Pressure Switch | 312926-258 — Low Pressure Switch | Factory-calibrated W.C. (water column) rating | SPST normally-open configuration | Direct OEM fit, no modification required
  • OEM vs Generic: OEM pressure switches are calibrated to exact W.C. specifications required by your unit's venting design. Generic substitutes often carry wider tolerances that can cause nuisance lockouts or, worse, allow ignition under unsafe draft conditions — always choose OEM for safety-critical components like pressure switches.
  • Install difficulty: 2/5 — Shut off power at the disconnect and gas supply before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended for verification), and zip ties for hose management. Photograph all tubing connections before removal to ensure correct reassembly of the pressure ports.
  • Warranty: 1-year OEM factory warranty on both switches. Orders placed before our same-day cutoff ship the same business day from our stocked warehouse.

Compatibility: Fits Carrier model CH14NA02400GAAAA condensing units. Verify your existing pressure switch part number (printed on the switch body label) against 312926-252 or 312926-258 before ordering to confirm high or low switch replacement. If you are unsure which switch has failed, our technical team can help diagnose via fault code before you order — contact us today and get your system back online fast.

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 CH14NA02400GAAAA?
Yes. This is the factory-specified OEM pressure switch for the Carrier CH14NA02400GAAAA. 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 CH14NA02400GAAAA?
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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