Question about Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1
It shows bo the heater will not start up and there is no outside control source. how can i fix this
BO means that you have bypassed operations. ie automation. if no automation is present then press and hold the Down arrow and Mode button for 3 seconds.
Posted on Aug 23, 2009
When I hold the mode and the down button at the same time, the bo error is still in display screen
Posted on May 30, 2015
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Posted on Jan 02, 2017
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