Question about Hayward H - Series 400 Heater Top for In - Ground Pools and Spas - Dhi400
I have a Hayward h400 heater. it won't turn on. what kind of troubleshooting can i do to figure out what the problem is. Thanks, Chris
Backwash rinse recirculate the filter if u r using a sand filter
Posted on Aug 26, 2009
Check pressure switch operation most heaters will not operate without sufficient water flow/pressure. You can use a multimeter to troubleshoot the wiring using the schematic. If its induced draft milivolt ignition verify there is suffiecient gas flow to the unit
Posted on May 26, 2009
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Posted on Jan 02, 2017
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