{"product_id":"carrier-pg9maa036080afka-pressure-switch-gxu1h8","title":"OEM Carrier Pressure Switch 1.81\" WC SPST for PG9MAA036080AFKA","description":"\u003ch1\u003eOEM Carrier Furnace Pressure Switch 1.81\" WC SPST — Model PG9MAA036080AFKA (HK06NB123)\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch is the factory-specified replacement for the \u003cstrong\u003eCarrier PG9MAA036080AFKA\u003c\/strong\u003e gas furnace. The pressure switch is a critical combustion-safety component — it monitors the negative pressure (draft) created by the inducer motor before allowing the ignition sequence to begin. When this switch fails, the furnace locks out before ignition, often throwing a pressure-switch fault code and leaving you with no heat. A failed switch typically results from a stuck-open or stuck-closed diaphragm, a cracked hose, or a failed inducer motor producing insufficient draft pressure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 1.81\" W.C. (water column) set point | SPST (single-pole, single-throw) | Standard spade terminals | Standard vacuum hose ports | Factory-calibrated diaphragm for precise draft sensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact W.C. tolerances for the PG9MAA036080AFKA. Generic switches may carry ±10–15% W.C. variance, risking nuisance lockouts or — more critically — allowing ignition under unsafe draft conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off gas and power before servicing. Tools needed: Phillips screwdriver, 1\/4\" nut driver, needle-nose pliers. Photograph all hose and wiring connections before disconnecting. Inspect the rubber vacuum hose for cracks before reusing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePG9MAA036080AFKA\u003c\/strong\u003e gas furnace. Note: OEM part HK06NB123 has been superseded by HK06NB124 as the current factory-authorized replacement — both are covered by this listing. Always verify the W.C. rating printed on your existing switch before ordering. Questions about fitment? Our HVAC parts team confirms compatibility before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642367889779,"sku":"CARRIE-PG9MAA036080AFKA-PRESSURE_SWITCH-HK06NB123","price":56.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642367922547,"sku":"CARRIE-PG9MAA036080AFKA-PRESSURE_SWITCH-HK06NB123-GEN","price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK06NB123_73f6ad3d-9a08-4e5f-b5ec-36a383adade3.jpg?v=1775036783","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9maa036080afka-pressure-switch-gxu1h8","provider":"National HVAC Parts","version":"1.0","type":"link"}