{"product_id":"vent-pressure-switch-kit-fd","title":"Hayward H-Series Low NOx Indoor Vent Pressure Switch Kit","description":"\u003cp\u003eThe Hayward FDXLVPS1930 is the indoor vent pressure switch kit for H-Series Universal Low NOx pool and spa heaters, models H150FD through H400FD. It is the genuine Hayward part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat the switch does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOn an indoor installation the heater has to prove that the vent is pulling before it will allow the burner to light. The vent pressure switch is what makes that proof. When the switch fails, sticks or drifts out of calibration, the heater either refuses to ignite or drops out soon after it fires, and the fault is easily blamed on gas supply or the ignition control.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you order\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is the version rated for 0 to 2000 feet of elevation, and it is specific to indoor vented heaters. Higher elevation installations and outdoor heaters use different switches, so confirm the part number on the switch you are replacing.\u003c\/p\u003e","brand":"Hayward","offers":[{"title":"Default Title","offer_id":48634166673620,"sku":"HAY-151-0050","price":76.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_f4b66f5c-ca0f-4648-9194-2e6661b25179.png?v=1788826074","url":"https:\/\/www.activepoolsupply.com\/products\/vent-pressure-switch-kit-fd","provider":"Active Pool Supply","version":"1.0","type":"link"}