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OEM Carrier Pressure Switch 0.18
Carrier

OEM Carrier Pressure Switch 0.18" WC for PY4GPAB36090AA

SKU: CARRIE-PY4GPAB36090AA-PRESSURE_SWITCH-HK06WC061 Brand: Carrier
✓ Guaranteed to fit PY4GPAB36090AA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Draft Pressure Switch 0.18" WC for Model PY4GPAB36090AA

This OEM draft inducer pressure switch is the factory-specified replacement for the Carrier PY4GPAB36090AA packaged unit. The pressure switch monitors the negative pressure created by the inducer motor to verify proper venting before allowing the ignition sequence to proceed. When it fails or drifts out of calibration, the control board cannot confirm safe combustion airflow and will lock out the unit — typically with a fault code before the burners ever fire. Common symptoms include a furnace that won't ignite, an inducer that runs but heating never starts, or a system stuck in a pre-ignition lockout loop.

  • Specs: 0.18" Water Column (W.C.) set point | SPST normally open | Draft-proving (closes on negative pressure) | OEM part number HK06WC061, superseded to HK06MB061 | Honeywell-manufactured for Carrier/Bryant/Payne
  • OEM vs Generic: This is a factory-matched OEM switch calibrated to the exact 0.18" W.C. trip point required by the PY4GPAB36090AA control board. Off-spec aftermarket switches with loose tolerances can cause nuisance lockouts or — more dangerously — allow ignition under inadequate draft conditions.
  • Install difficulty: 2/5 — Shut off power and gas before servicing. Locate the switch on or near the inducer housing. Disconnect the single rubber pressure hose and two wire terminals. Swap the switch, reconnect hose and terminals, restore power. Tools needed: flat-head screwdriver, needle-nose pliers, manometer (to verify draft after install). Always clear any fault codes after replacement.
  • Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY4GPAB36090AA. OEM part number HK06WC061, current superseding part number HK06MB061. Also fits select Bryant and Payne models with the same 0.18" W.C. pressure switch specification — verify your unit's data plate and existing part number before ordering. Have questions about fitment? Our HVAC parts team confirms 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 PY4GPAB36090AA?
Yes. This is the factory-specified OEM pressure switch for the Carrier PY4GPAB36090AA. 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 PY4GPAB36090AA?
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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