{"product_id":"pressure-switch-1","title":"Pentair Pressure Switch for MiniMax Heaters","description":"\u003cp\u003eThe Pentair 473605 is the genuine pressure switch listed for MiniMax CH heaters in the 150 through 400 range and MiniMax AG heaters 75, 100 and 100SC.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it is there for\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe pressure switch is a safety interlock. It watches water pressure inside the heater and holds the ignition sequence until that pressure is high enough to prove water is actually moving. A heater that fires with no flow through it damages itself quickly, and this small switch is what prevents that.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDiagnosing before you replace\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA heater that will not fire often points here, but the switch is sometimes reporting the truth. Low flow from a dirty filter, a partly closed valve, a packed skimmer or pump basket, or a tired pump will keep real pressure below the point where the switch closes. Restore flow first. If the pump is moving water properly and the switch still will not make, replace the switch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore ordering\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHeater pressure switches look alike across models and are not interchangeable. Check 473605 against the number on the switch you are replacing.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48634266190036,"sku":"PUR-151-3370","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_232b10b3-8807-4f5a-8197-c9c7bc6517b4.jpg?v=1788827909","url":"https:\/\/www.activepoolsupply.com\/products\/pressure-switch-1","provider":"Active Pool Supply","version":"1.0","type":"link"}