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Recent content by colin111

  1. C

    ISAR HE 35 Diverter valve actuator replacement.

    I have a ISAR HE35 3 years old, when the function of the boiler switches from HW to CH the diverter valve creates a hooting sound, like an owl (just once) when the actuator activates. has anyone had this problem if so did the problem lay with the valve or actuator. is replacement strightforward...
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