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Isar HE24 H9/L9

Discuss Isar HE24 H9/L9 in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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maintain2let

Have a customer with one of these faulting to H9 & L9 - seem to recall last time I had this it was PCB. Any one else had any probs?
 
h9/l9 is hi lock out if memory serves me right check pumps spinning an stats are working ok isars did have a problem with the black box pcbs they were changed to the orange 1s on the later boilers
 
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