Question about Hayward H-series Electronic Gas Pool Heater H300

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Pool heater green light is on, but when when we tried to heat spa, no light, no heater kicked on. What is going on?

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  • A Miller May 11, 2010

    Does your heater do both your pool and your spa? You probably know, the boiler will not fire if there is no pressure. I dont know about your plumbing and how it changes over from hating the pool to the spa but for the heater to fire for any application, you must have water pressure. There is the possibility that your pressure switch is working intermittently but you hint it will heat the pool.

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Clean the filter

Posted on Sep 11, 2009

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