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OEM Carrier Pressure Switch SPST 0.27
Carrier

OEM Carrier Pressure Switch SPST 0.27" WC — PG8MAA036070AAJA

SKU: CARRIE-PG8MAA036070AAJA-PRESSURE_SWITCH-HK06WC091 Brand: Carrier
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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier SPST High-Fire Pressure Switch for Model PG8MAA036070AAJA

This OEM pressure switch (part# HK06WC091, also supplied as assembly HK06WC069 with bracket) is the factory-specified inducer proving switch for the Carrier PG8MAA036070AAJA gas furnace. Its job is critical: it monitors the negative pressure (draft) created by the inducer motor and signals the control board that safe flue venting is confirmed before allowing ignition to proceed. When this switch fails or drifts out of calibration, the furnace will lock out — typically before the igniter even glows — leaving you with a no-heat call and a fault code pointing to a pressure switch open condition.

  • Specs: 0.27" W.C. break point | 0.42" W.C. max break | SPST (Single Pole, Single Throw) | 28VA @ 24VAC pilot duty rating | Factory-calibrated Honeywell-manufactured diaphragm assembly
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part built by Honeywell. Generic aftermarket switches commonly ship with ±15% W.C. tolerance — a mismatch that causes nuisance lockouts or, worse, allows the furnace to fire without proper draft. OEM means the setpoint is exact.
  • Install difficulty: 2/5 — Shut off power and gas before starting. Tools needed: flathead screwdriver, 1/4" nut driver, multimeter (to confirm open/closed across switch terminals), and a manometer if verifying inducer draft. Disconnect the two wires and single hose port, swap, and reconnect. Note: HK06WC069 includes the mounting bracket — confirm your application before ordering.
  • Warranty & Shipping: 1-year OEM factory warranty. In stock and ships same business day from our warehouse. Replaces discontinued OEM part numbers HK06WC091 and HK06WC069 — current updated OEM cross-reference is HK06MC110.

Compatibility: Engineered for the Carrier PG8MAA036070AAJA packaged gas furnace. Also fits many Carrier, Bryant, and Payne gas furnace models sharing the same 0.27" W.C. SPST high-fire pressure switch specification — always verify your unit's data plate W.C. rating before ordering. Have a fitment question? 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 OEM Carrier Pressure Switch SPST 0.27" WC — PG8MAA036070AAJA?
Yes. This is the factory-specified OEM pressure switch for the Carrier OEM Carrier Pressure Switch SPST 0.27" WC — PG8MAA036070AAJA. 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 Pressure Switch SPST 0.27" WC — PG8MAA036070AAJA?
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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