What is the proper temperature cycle for a gas-fired home boiler (including timing of cycles)? A separate zone of my house does not reach the desired temperature during cold weather. This has started after my system was converted from oil to gas. The installer has checked everything (bleeding; sizing of the zone and boiler; etc) and now states that more radiators are needed in the zone. Is it possible that this is a control problem and that the zone does not get hot water long enough to reach the desired temperature?

Is it possible that this is a control problem and that the zone does not get hot water long enough to reach the desired temperature?

Yes