Why are my radiators cold at the bottom in Glasgow?

When a radiator is hot at the top but noticeably cold across the bottom, restricted circulation or deposits inside the radiator can be one possible cause. Sludge can settle in low points and reduce the area through which hot water flows.

However, a cold section does not prove the whole system needs an aggressive power flush. Valve problems, low flow or system balancing can produce similar symptoms. A heating engineer should look at how several radiators behave, the age and condition of the system and the water quality before recommending cleaning.

Doherty's standard boiler packages include system cleaning and treatment, and the Glasgow heating service can advise if more extensive remedial work is justified for an existing system.