I have a range tribune system which is heated by our Stanley (Aga type) cooker (boiler), this drives our underflower heating system and hot water. Sadly in the coldest winter it the heating part seems to have stopped although we still get hot water? The Stanley runs for about 20secs then cuts, if you cx the baffles on the Stanley to heat the oven it works ok. There also is a noise of running /bubbling water from the Stanley but no water leaks.
Any ideas welcomed, clueless on the plumbing front and can't seem to get our normnal boiler support.