
Hot water but no heating: what it usually means
For the house with hot water and cold radiators: the controls to check first, the part most combi boilers blame, and why this is not the same fault as a breakdown.
On this guide
- How this is different from a breakdown
- The checks worth making first
- The diverter valve, in plain terms
- Zone valves, for cylinder-based systems
- What to tell the engineer before they arrive
- When it is more than the valve
4 min read 808 words 3 sources

