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OEM Carrier Low Pressure Switch 7#OPN 22#CLS 50
Carrier

OEM Carrier Low Pressure Switch 7#OPN 22#CLS 50" — PH1RPA120000AAWB

SKU: CARRIE-PH1RPA120000AAWB-PRESSURE_SWITCH-HK02ZB044 Brand: Carrier
✓ Guaranteed to fit PH1RPA120000AAWB — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Low Pressure Switch HK02ZB044 — 7 PSI Open / 22 PSI Close for Model PH1RPA120000AAWB

This is the genuine OEM Carrier pressure switch (part number HK02ZB044), the factory-specified replacement for the Carrier PH1RPA120000AAWB packaged heat pump unit. The pressure switch is a critical safety and proving device in the refrigerant circuit: it monitors system pressure and signals the control board that operating conditions are within safe range. When this switch fails or becomes stuck open, the unit will refuse to start, go into safety lockout, or short-cycle — leaving you with no heating or cooling and an often misleading fault code. Replacing with the correct OEM part restores precise pressure sensing and factory-grade reliability.

  • Specs: Opens at 7 PSI | Closes at 22 PSI | 50" wire leads | 24V control voltage | Country of origin: Mexico — factory-matched to Carrier design tolerances
  • OEM vs Generic: OEM pressure switches meet exact factory design-life testing and preserve your equipment warranty. Aftermarket alternatives often lack precise calibration, risking nuisance lockouts or, worse, masking a genuine low-pressure refrigerant fault.
  • Install difficulty: 2/5 — Disconnect power before beginning. Tools needed: 1/4" nut driver, needle-nose pliers, and a short extension. Note wire polarity and lead routing before disconnecting the old switch. Confirm system pressures are nominal before condemning this part.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse on all in-stock orders.

Compatibility: Designed for the Carrier PH1RPA120000AAWB packaged heat pump unit. Always verify the OEM part number printed on your existing switch before ordering to confirm fitment. Our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork, no return hassles.

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 OEM Carrier Low Pressure Switch 7#OPN 22#CLS 50" — PH1RPA120000AAWB?
Yes. This is the factory-specified OEM pressure switch for the Carrier OEM Carrier Low Pressure Switch 7#OPN 22#CLS 50" — PH1RPA120000AAWB. 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 OEM Carrier Low Pressure Switch 7#OPN 22#CLS 50" — PH1RPA120000AAWB?
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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