Hi guys, just had customer on phone saying they got no hot water or heating with pump light flashing. they say they have 1.5 pressure and can hear pump running. Am i right in thinking this is usually the primary flow valve pin not lifting?
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Hi guys, just had customer on phone saying they got no hot water or heating with pump light flashing. they say they have 1.5 pressure and can hear pump running. Am i right in thinking this is usually the primary flow valve pin not lifting?
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