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OEM Carrier High Pressure Switch 670-470# for PH4ANG048000BAAA
Carrier

OEM Carrier High Pressure Switch 670-470# for PH4ANG048000BAAA

SKU: CARRIE-PH4ANG048000BAAA-PRESSURE_SWITCH-312926-252 Brand: Carrier
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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier High Pressure Switch 670-470# for Model PH4ANG048000BAAA

This OEM high pressure switch (part number 312926-252) is the factory-specified replacement for the Carrier PH4ANG048000BAAA packaged heat pump unit. The high pressure switch continuously monitors refrigerant pressure on the high side of the refrigeration circuit. When system pressure exceeds the rated cutout threshold, the switch opens the control circuit, shutting the compressor down to prevent catastrophic mechanical failure. A faulty high pressure switch can cause nuisance lockouts, compressor short-cycling, or a unit that trips on high pressure fault codes even when system pressures are normal.

  • Specs: 670 PSI cutout / 470 PSI reset | SPST normally closed | Factory-calibrated pressure setpoints | OEM part number 312926-252
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part with factory-calibrated cutout and reset pressures. Aftermarket switches frequently carry wider tolerances, risking either nuisance trips or — more dangerously — failure to protect the compressor at true fault conditions.
  • Install difficulty: 3/5 — Refrigerant system must be recovered before replacing a high pressure switch on a live circuit. Tools required: manifold gauge set, refrigerant recovery machine, adjustable wrench, and a multimeter to confirm continuity after installation. Licensed EPA 608-certified technician required.
  • Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Confirmed fit for Carrier model PH4ANG048000BAAA packaged heat pump. Verify part number 312926-252 against your unit's wiring diagram and data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all stocked 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 $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 PH4ANG048000BAAA?
Yes. This is the factory-specified OEM pressure switch for the Carrier PH4ANG048000BAAA. 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 PH4ANG048000BAAA?
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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