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OEM Carrier Draft Pressure Switch 0.18
Carrier

OEM Carrier Draft Pressure Switch 0.18" WC for PY4GNAB36060AA

SKU: CARRIE-PY4GNAB36060AA-PRESSURE_SWITCH-HK06WC061 Brand: Carrier
✓ Guaranteed to fit PY4GNAB36060AA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Draft Inducer Pressure Switch 0.18" WC for Model PY4GNAB36060AA

This OEM Carrier draft pressure proving switch (part number HK06WC061, current superseding part HK06MB061) is the factory-specified replacement for the Carrier PY4GNAB36060AA packaged unit. The pressure switch monitors negative pressure created by the induced-draft blower to confirm safe combustion venting before the gas valve is allowed to open. When this switch fails or the pressure signal is interrupted, the control board cannot advance past the inducer proving stage — resulting in a hard lockout with no ignition, no heat, and typically a diagnostic fault code pointing to a pressure switch or inducer circuit fault.

  • Specs: 0.18" Water Column (W.C.) set point | SPST normally open | Replaces OEM part HK06WC061 / superseded by HK06MB061 | Cross-references Honeywell IS20224-5236 | Factory-matched switching threshold
  • OEM vs Generic: OEM pressure switches are calibrated to exact W.C. tolerances at the factory. Aftermarket units frequently drift outside acceptable switching ranges, causing nuisance lockouts or — worse — failing to detect a blocked flue, creating a safety hazard. Always match the rated W.C. exactly.
  • Install difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, flat-head screwdriver, digital manometer (recommended to verify inducer static pressure after install). Photograph hose routing before disconnecting the pressure tube. Inspect the rubber hose for cracks or blockages before replacing the switch.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Fits Carrier model PY4GNAB36060AA packaged units. Also compatible with select Bryant and Payne models using the 0.18" W.C. SPST pressure switch specification. Verify the W.C. rating printed on your existing switch before ordering — an incorrect W.C. rating will cause the unit to fault. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy.

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 PY4GNAB36060AA?
Yes. This is the factory-specified OEM pressure switch for the Carrier PY4GNAB36060AA. 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 PY4GNAB36060AA?
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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