daved525 Posted October 20, 2014 Report Share Posted October 20, 2014 My 2009 Marquis Resort spa was giving intermittent HH error messages, even though water temp was only 103. Had tech come out & he saw corroded terminals on heater and replaced. Now red light comes on but no voltage across heater. Any ideas? I'm afraid I need to replace the board ($475!), unless there's an easier fix. Thanks. Quote Link to comment Share on other sites More sharing options...
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