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Brian, Plumber
Category: Plumbing
Satisfied Customers: 863
Experience:  16 yrs. experience as plumber, including full bathroom and kitchen installations.
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I have a biasi advanced plus35c 47-583-31. The DHW keeps

Customer Question

Hi I have a biasi advanced plus35c 47-583-31. The DHW keeps going hot and cold systems pressure is 13 and when burner goes out PO plus temp reading flash. Can you surges a cause thanks in advance
Assistant: I'll do all I can to help. How long have you been dealing with this?
Customer: Just over this weekend
Assistant: Do you plan on doing the work yourself?
Customer: If I can I'm a machanical fitter
Assistant: Anything else we should know to help you best?
Customer: It does have a spanner flashing but no error code
Assistant: How old is the appliance? Have you gotten error messages before?
Customer: 2 years and only fl filling request
Submitted: 4 months ago.
Category: Plumbing
Expert:  Brian replied 4 months ago.
It's a good chance that either the plate heat exchanger has clogged up or you have a thermistor playing up.
To be honest it's usually the plate heat exchanger.
Possibly not protected from hard water. Or the boiler was fitted to an old system and the heat side of the plate has clogged up with black sludge.