Is your radiator cold to the touch at the bottom and you’re not sure how to fix it? With Ideal Heating’s top tips, you’ll be able to identify possible causes and find out what you can do to fix the problem. We all know that heat rises, so having a radiator that’s cooler at the bottom than the top might not seem like cause for alarm. However, radiators are designed to emit heat evenly once your central heating has kicked in - they should never be colder at the top or cold at the bottom once the system is up to temperature. If your radiator usually gets hot, but now appears to be only hot at the top but not at the bottom, it may require further investigation.