OEM Carrier Pressure Switch with Bracket (HK06WC090) for Model PG8UAA036045ADJA

This is the genuine OEM replacement pressure switch with bracket for the Carrier PG8UAA036045ADJA packaged gas furnace. The pressure switch is a critical safety device that monitors the negative pressure (draft) created by the inducer motor before allowing the ignition sequence to proceed. If the switch fails to close — due to a faulty diaphragm, blocked condensate port, or cracked hose — the control board will lock out the furnace and prevent it from firing, leaving you with no heat. Typical symptoms include a fault code indicating a pressure switch open fault, the inducer running continuously with no ignition, or the furnace short-cycling before the burners light.

• Specs: –0.33" W.C. (inches water column) set point | Includes factory mounting bracket | Single-port diaphragm-type switch | Factory-matched OEM tolerance for reliable draft proving
• OEM vs Generic: Genuine Carrier OEM part HK06WC090 ensures exact W.C. calibration and bracket fitment. Off-brand switches often carry ±10–15% W.C. tolerances, leading to nuisance lockouts or — worse — unsafe operation if the switch closes under insufficient draft.
• Install difficulty: 2/5 — Power down the furnace and wait for the inducer to stop before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers. Disconnect the rubber hose and two spade terminals, unbolt the old bracket, and mount the new assembly. Inspect the hose for cracks and the condensate port for blockage before reinstalling.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed as a direct OEM replacement for the Carrier PG8UAA036045ADJA packaged gas furnace. Part number HK06WC090 also supersedes legacy part numbers HK06WC088, HK06WC086, HK06WC076, HK06WC072, HK06WC073, HK06WC074, HK660001, 326750-751, 310315-751, and 310315-752 — always verify the W.C. rating on your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment before you buy.