How to Fix a Home Radiator Leak

 Home radiators are an essential part of the heating system in any household. They work by heating water, which then circulates through the pipes and into the radiators, where it releases heat into the room. A leaking radiator not only reduces the efficiency of your heating system, but it can also cause damage to your home. If you notice a leak in your radiator, it's important to fix it as soon as possible to prevent any further damage.

Home Radiator Leak

What Causes a Radiator Leak?

The most common cause of a radiator leak is corrosion. Over time, the metal in the radiator can corrode and weaken, causing small holes to develop. Another cause of radiator leaks is damage to the radiator, such as cracks or holes caused by impact. In some cases, a faulty valve or pressure release can also cause a radiator to leak.

How to Fix a Home Radiator Leak

If you've identified a leak in your home radiator, you can fix it yourself with a few simple steps:

  • Turn off the heating system and allow the radiator to cool down completely.
  • Locate the leak by checking the radiator for any visible damage or wet spots.
  • If the leak is coming from a small hole or crack, you can use a radiator sealant to fix it. Simply apply the sealant to the affected area according to the manufacturer's instructions.
  • If the leak is more severe, you may need to replace the radiator. This is a more complex task that should be carried out by a professional.
  • Once you've fixed the leak, turn the heating system back on and check the radiator for any further leaks.

The Pros and Cons of Fixing a Home Radiator Leak

Fixing a home radiator leak has both advantages and disadvantages:

Prevents further damage to your homeCan be costly if you need to replace the radiator
Improves the efficiency of your heating systemRequires some DIY skills
Can be done relatively quicklyMay not be a permanent fix


Q: Can I use radiator sealant on a large leak?

A: No, radiator sealant is only suitable for small leaks. If the leak is more severe, you may need to replace the radiator.

Q: What should I do if I can't find the source of the leak?

A: If you can't locate the source of the leak, it's best to call a professional to inspect your heating system.

Q: Can I continue to use my heating system if my radiator is leaking?

A: It's not recommended to use your heating system if your radiator is leaking. This can cause further damage to your home and may also be a safety hazard.

Q: How often should I check my radiators for leaks?

A: It's a good idea to check your radiators for leaks at least once a year, preferably before the start of the heating season.