Hi, I have the above combi boiler in the house we just moved into. It was running hot/cold and had not been serviced for a long time so we had it serviced last week. The service person seemed competent and did a lot of filing to get off deposits. (I couldn't fit in the corner at the same time so am not sure exactly which parts were cleaned.)
Unfortunately the hot/cold problem has not gone away (I'm not sure if he cleaned the flue venturi as seems to be recommended for this problem - I'll look into this and/or query him.)
But moreover a new problem has started: now when I turn the boiler off it slowly leaks water from the main heat exchanger (or one of its washer connections - hard to tell exactly even with the main burner case open.) It leaks until the water pressure is quite low. I *think* this only happens when the unit is turned "off" not when it is left in "rest" mode, i.e. with the DHW on but no demand. There is no noticeable leak when the DHW is working in demand but the pressure does drop after use so perhaps the leaked water is just getting boiled away inside the case?
Perhaps the heat exchanger sprung a leak with all the filing? Or one of the washers needs replacing or reseating? I welcome your comments.
Unfortunately the hot/cold problem has not gone away (I'm not sure if he cleaned the flue venturi as seems to be recommended for this problem - I'll look into this and/or query him.)
But moreover a new problem has started: now when I turn the boiler off it slowly leaks water from the main heat exchanger (or one of its washer connections - hard to tell exactly even with the main burner case open.) It leaks until the water pressure is quite low. I *think* this only happens when the unit is turned "off" not when it is left in "rest" mode, i.e. with the DHW on but no demand. There is no noticeable leak when the DHW is working in demand but the pressure does drop after use so perhaps the leaked water is just getting boiled away inside the case?
Perhaps the heat exchanger sprung a leak with all the filing? Or one of the washers needs replacing or reseating? I welcome your comments.