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Supply high limit
Sage2.2 supply sensor detected temperatures in excess of 210°F.
• Heating load at time of error was far below the minimum firing rate of the boiler.
• Defective system circulator or no flow in primary loop.
• Defective boiler circulator, no flow or insufficient flow in boiler loop.
• Control system miswired so that the boiler operation is permitted when no zones are calling.
