Cold radiators are a common issue in Edinburgh homes, particularly at the start of winter. The cause is usually circulation, pressure, or internal build-up.
Common causes
Trapped air causes radiators to feel cold at the top. Sludge build-up causes cold patches, usually at the bottom. Closed or stuck valves can stop hot water entering. Low boiler pressure also prevents heat circulation.
Simple checks
Bleed radiators, check valves are open, and confirm boiler pressure is within the recommended range. Ensure heating controls are calling for heat.
When the issue is deeper
If multiple radiators remain cold, or heat is uneven, your system may need balancing or flushing. Boiler pump or diverter valve faults can also prevent heating.
When to call a professional
If basic checks don’t resolve the issue, professional diagnosis prevents further damage and restores efficiency.