Heating problems at Christmas are a major pain jeanie. Pleased your home is at least mostly warm. We had a chemical system flush in our last home when we replaced the boiler. It was fairly expensive I seem to recall but all was well afterwards. I do understand your frustration. We’ve our own heating issues at the moment with a fairly new system. It seems some of the installation wasn’t done well, not what we expected.
I think in your position I would get several opinions, maybe ask friends and family for recommendations of a trustworthy heating engineer. See what the concensus is. I’m sorry not to be much help. I hope someone with more knowledge will be along soon. Good luck.
I am procrastinating and need to stop!


