{"product_id":"heater-1-2-flow-switch-q-12ds50","title":"Coates Heater 1\/2\" Flow Switch, Q-12DS50","description":"\u003cp\u003eThe Coates 23000105 is the half inch flow switch, model Q-12DS50, used on Coates pool heaters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy the heater needs it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA flow switch is a safety interlock. It closes only when water is genuinely moving through the heater, and the control uses that as a condition of firing. That single signal is what stops the heater from putting heat into water that is not going anywhere.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen it is the fault\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA heater that refuses to start with a running pump, a clean filter and open valves is a classic failed flow switch. The switch either sticks open, so the heater never sees flow, or the paddle and contacts wear until they no longer make reliably.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOne thing not to do\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDo not jumper the switch to force the heater on. That takes away the only thing preventing the heater from running dry, and a heat exchanger fired without flow does not survive long.\u003c\/p\u003e","brand":"Coates Heater","offers":[{"title":"Default Title","offer_id":48633710051540,"sku":"CHC-151-7562","price":84.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_2bba174e-2fb7-4217-b877-2098a38d1fc9.jpg?v=1788812286","url":"https:\/\/www.activepoolsupply.com\/products\/heater-1-2-flow-switch-q-12ds50","provider":"Active Pool Supply","version":"1.0","type":"link"}