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Plumberpro, Mechanical Engineer
Category: HVAC
Satisfied Customers: 634
Experience:  Over 20 years experience in plumbing heating and gas
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We have no hot water and boiler display flashing CON

Customer Question

Hi we have no hot water and boiler display flashing CON
Submitted: 2 years ago.
Category: HVAC
Expert:  Plumberpro replied 2 years ago.

CON means there is no communication between the PCB and display this may be due to the display being lose or a problem with either the PCB or display. On the PCB top left hand side there is a multi plug X20, on the bottom left hand corner of that plug is a soldered ring marked up as 5V, check whether there is 5v DC between 5V and earth if there is the PCB is OK the display is faulty, if there isn’t the PCB is faulty.

Expert:  Plumberpro replied 2 years ago.
Hi, would you mind rating your answer please. , tgankjs