Question about Hayward H-series Electronic Gas Pool Heater H400
Temp on high on water boils in heater core h400 older model heater has temp dials
This will be a water flow problem. If you have a heater by-pass it will need to be almost closed (80-90%) If the water has overheated you may need to remove the header going into the heater and replace the internal by-pass assembly.
Posted on Aug 02, 2010
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Posted on Jan 02, 2017
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