There can be audible indications that your radiators require bleeding in the form of gurgling noises. Another sign is when a radiator is taking longer than usual to heat up.
And you should feel all the radiators in your home for cold spots – usually the top section will feel much colder than the bottom if bleeding is required.
The radiator or radiators could even be completely cold in extreme cases. Our guide on how to bleed a radiator can help you rectify the issues.
And if a brand new radiator is required, be sure to browse our radiator buying guide for inspiration.