The house isn’t getting warm like it used to. Some radiators are hot at the top and cold at the bottom. Or one room is always freezing while the rest are fine. Or you’ve had an extension and the heating doesn’t reach it.
You’re not sure if the whole system needs replacing or if a smaller fix will sort it. That’s what the survey is for. We’ll tell you what’s actually going on and what the options are, without pushing you towards the most expensive one.