Patrick Nyberg
February 09, 2016

The ZSR 103 relay is having a problem with the priority DHW. The aquastat closes but the DHW does not turn on. I kill power to the relay and turns it back on then the DHW engages. This is very intermittent and frustrating. What could be the problem. It worked fine for the first 4 months and these last 2 months have been a bug bear to trouble shoot.

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