is there an inlet filter on a 105e.if so where.diaphram has been changed and all was well for 3 days.plunger isnt coming out enough to make microswitch on shower but is when tap on full.maybe diverter.
Friend of mine has similar problem to this... taps OK but shower dies after a very short period. Microswitch drops out due to plunger. He's fitting a new pressure diff (248063) rather than just the diaphragm. I'll let you know the outcome.
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