I take it with those readings, it's a standard efficiency boiler, however, he has set the Analyiser up to read a high efficiency boiler. :-o
A boiler service is not just a safety check & a quick clean of the heat exchanger. It is servicing the appliance as per the manufacturer's instructions & a drain down of the boiler to check/adjust the vessel pressure is a must. He must also gas rate the appliance to see if the boiler is running within +5%/-10% of MI's.
He must check standing & working pressures to ensure they are within limits. He must do all this with any other gas appliance switch on at their max, such as a hob with all rings on full & a gas fire on high fire.
A boiler service is not just a safety check & a quick clean of the heat exchanger. It is servicing the appliance as per the manufacturer's instructions & a drain down of the boiler to check/adjust the vessel pressure is a must. He must also gas rate the appliance to see if the boiler is running within +5%/-10% of MI's.
He must check standing & working pressures to ensure they are within limits. He must do all this with any other gas appliance switch on at their max, such as a hob with all rings on full & a gas fire on high fire.