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OEM Carrier Pressure Switch High/Low Fire for PG8MVA048090AAJA
Carrier

OEM Carrier Pressure Switch High/Low Fire for PG8MVA048090AAJA

SKU: CARRIE-PG8MVA048090AAJA-PRESSURE_SWITCH-HK06WC091 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier Pressure Switch (High Fire & Low Fire) for Model PG8MVA048090AAJA

This listing covers both OEM Carrier pressure switches factory-specified for the Carrier PG8MVA048090AAJA two-stage gas furnace: HK06WC091 (High Fire, SPST) and HK06WC092 (Low Fire, SPDT — includes pressure tube). The pressure switch is a critical safety device that monitors negative pressure produced by the draft inducer motor. If the inducer fails to generate adequate suction, the switch stays open and the furnace locks out before the gas valve ever opens — protecting your heat exchanger from dangerous flue gas rollout.

  • Specs — HK06WC091 (High Fire): SPST | Carrier/Honeywell Factory Authorized Part | Replaced by HK06MC110 where noted | Fits two-stage furnace high-fire proving circuit
  • Specs — HK06WC092 (Low Fire): SPDT | Makes @ 0.22" W.C. | Resets @ 0.18" W.C. | Includes OEM pressure tube | Fits two-stage furnace low-fire proving circuit
  • OEM vs Generic: These are genuine Carrier/Honeywell factory-authorized parts. Generic aftermarket switches frequently carry incorrect W.C. setpoints, causing nuisance lockouts or — worse — unsafe ignition attempts. OEM is the only safe choice on a pressure switch.
  • Install difficulty: 3/5 — Confirm inducer motor operation before condemning the switch. Tools needed: manometer or magnehelic gauge, flat-head screwdriver, multimeter. Disconnect power before removing wiring. Verify W.C. rating on your unit's wiring diagram and data plate before installing. Note which port the pressure tube connects to on two-stage units.
  • Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by cutoff time.

Compatibility: Engineered for the Carrier PG8MVA048090AAJA two-stage gas furnace. HK06WC091 serves the high-fire proving circuit; HK06WC092 serves the low-fire proving circuit — both switches may require replacement if the unit shows a pressure switch fault code. Always cross-reference the W.C. rating on your unit's wiring diagram before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy — order with confidence and get same-day shipping.

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 PG8MVA048090AAJA?
Yes. This is the factory-specified OEM pressure switch for the Carrier PG8MVA048090AAJA. 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 PG8MVA048090AAJA?
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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