Heating Systems
Radiators, thermostats, and efficiency tips — from Gas Safe registered engineers
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Why are my radiators cold at the bottom?
Radiators cold at the bottom usually indicate sludge buildup, requiring a powerflush to restore proper heating.
Why are my radiators cold at the top but hot at the bottom?
Radiators cold at the top have trapped air inside. Bleed the radiator using a radiator key to release the air and restore full heating.
Why is one radiator not heating up when others are fine?
A single cold radiator usually means a stuck valve, air lock, or localised blockage. Check the thermostatic valve and try bleeding the radiator first.
Why is my thermostat not controlling my heating?
Thermostat issues are usually caused by dead batteries, incorrect settings, or a wiring fault between the thermostat and boiler.
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