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HA fault on ideal isar 24he.

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Gary.thornton

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Replaced a main heat ex today for a customer on an ideal isar, heating is ok but when running hot water it overheats and comes up with HA fault code, only happens on hot water though. Any way to shift the air from the plate heat ex? Its situated flat in these boilers instead of the usual on its side horizontal. Tried cracking the 2 bolts while running it to no avail.
Anyone else have experience with this?

Cheers!
 

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