OEM Carrier Pressure Switch for Model GA1AAD060100AAJA — HK06WC085 / HK06WC097

This OEM pressure switch is the factory-specified replacement for the Carrier GA1AAD060100AAJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm proper venting before allowing the ignition sequence to proceed. When the switch fails — or when tubing cracks, ports clog, or the diaphragm wears — the control board reads an open circuit and locks out the furnace, preventing any heat output. Common symptoms include a blinking fault code for "pressure switch stuck open," the inducer running continuously with no ignition, or the furnace cycling on and off without producing heat.

• Specs: Replaces OEM part numbers HK06WC085 (standard) and HK06WC097 (with mounting bracket) | Factory-calibrated W.C. (water column) rating | Single-port diaphragm design | 24V control circuit compatible
• OEM vs Generic: OEM pressure switches are factory-calibrated to the exact W.C. rating required by this furnace model. Generic substitutes often carry wider tolerances that can cause nuisance lockouts or, more dangerously, allow ignition under marginal venting conditions — a safety risk not worth the savings.
• Install difficulty: 2/5 — Power down and disconnect the furnace at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a digital manometer (recommended to verify switch operation post-install). Inspect all rubber tubing and ports for cracks or blockages before replacing the switch, as these are frequent root causes of pressure switch faults.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier GA1AAD060100AAJA gas furnace. OEM part number HK06WC085 is the standard switch; HK06WC097 includes the factory mounting bracket — select the version that matches your existing configuration. Verify your unit's model and serial number on the data plate inside the furnace cabinet before ordering. Our fitment team is available to confirm compatibility before you buy. In stock — order now and ships today.