{"product_id":"carrier-py1rja036074abwa-pressure-switch-jri7yl","title":"OEM Carrier High Pressure Switch HK02ZA442 for PY1RJA036074ABWA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA442 \/ HK02ZB044 for Model PY1RJA036074ABWA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch is the factory-specified replacement for the \u003cstrong\u003eCarrier PY1RJA036074ABWA\u003c\/strong\u003e. The pressure switch proves that the draft inducer is operating correctly before the control board allows ignition to proceed. When the switch fails — either stuck open or failing to close — the furnace will lockout before reaching the ignition stage, leaving you with no heat. A faulty pressure switch is one of the most common causes of furnace no-heat calls and diagnostic error codes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM Part Numbers: HK02ZA442 (High Pressure Switch) \u0026amp; HK02ZB044 (Pressure Switch) | 24V coil voltage | 7 PSI open \/ 22 PSI close | 50\" lead length | Cut-In Temp: 7 | Cut-Out Temp: 22 | Country of Origin: Mexico\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM part — factory-calibrated to exact pressure thresholds. Aftermarket switches often carry wider tolerances that can cause nuisance lockouts or, worse, unsafe ignition timing. OEM is always the recommended choice for pressure-critical safety components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power and gas supply before starting. Tools needed: flat-head screwdriver, needle-nose pliers, and a manometer or magnehelic gauge to verify inducer pressure if diagnosing. Always confirm the inducer motor is functioning before replacing the switch, as a failed inducer is often the root cause of pressure switch faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PY1RJA036074ABWA\u003c\/strong\u003e. This listing covers both OEM part numbers HK02ZA442 and HK02ZB044 — verify your existing part number against your unit's wiring diagram or data plate before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy — call or chat today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640675357043,"sku":"CARRIE-PY1RJA036074ABWA-PRESSURE_SWITCH-HK02ZA442","price":90.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640675389811,"sku":"CARRIE-PY1RJA036074ABWA-PRESSURE_SWITCH-HK02ZA442-GEN","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA442_d0362e0d-94b5-4eca-ab6a-9f50ae1a17d5.jpg?v=1775033638","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rja036074abwa-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}