{"product_id":"oem-goodman-1-4-wc-pressure-switch-no-for-gun040-2-b1370107","title":"OEM Goodman -1.4\" WC Pressure Switch NO for GUN040-2 — B1370107","description":"\u003cp\u003eThe genuine Goodman B1370107 Pressure Switch is a normally-open draft-proving control for the GUN040-2 furnace. It monitors the inducer's vacuum and closes at a -1.4 in. water column setpoint, confirming proper venting before the control board permits ignition — a required safety interlock against flue blockage and backdrafting.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSetpoint: -1.4 in. water column (WC)\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally open (NO), closes on negative pressure\u003c\/li\u003e\n\u003cli\u003eFunction: Inducer draft-proving safety switch\u003c\/li\u003e\n\u003cli\u003eFits Goodman GUN040-2 furnace\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1370107\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e switch is calibrated to the precise -1.4\" WC trip point required by the furnace's control sequence. Our \u003cstrong\u003egeneric equivalent\u003c\/strong\u003e matches the setpoint and hose-port fitting for reliable, budget-friendly replacement.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Two spade terminals and one silicone hose connection. Ensure the pressure port faces down to shed condensate. If a new switch won't close, inspect the vent, hose, and inducer before replacing again.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058187026803,"sku":"GOODMAN-13108","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-1-4-wc-pressure-switch-no-for-gun040-2-b1370107","provider":"National HVAC Parts","version":"1.0","type":"link"}