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My Boiler Is Too Hot

My Boiler Is Too Hot

 

My Boiler Is Too Hot – What Should I Do?

Is your boiler too hot to touch or showing signs of overheating? This can be worrying, especially if you’re not sure what to do next. At Plumble, we help homeowners across Kent understand and fix heating problems quickly. Let’s look at what causes your boiler to get too hot and how to make it safe again.

Why Is My Boiler Overheating?

There are several reasons your boiler may be running hotter than normal. These include:

  • Blocked or restricted flow: If water can’t move through the system, heat builds up. This often happens due to a closed valve, sludge, or trapped air.
  • Broken thermostat: A faulty thermostat may fail to shut the boiler off at the correct temperature, causing it to overheat.
  • Pump failure: Without the pump circulating water, the heat remains in the boiler and rises.
  • Limescale in the heat exchanger: This is common in Kent and can lead to localised overheating inside the boiler.

Can an Overheating Boiler Be Dangerous?

In most cases, boilers have built-in safety features that shut them down before danger occurs. However, overheating still puts strain on your system. It can lead to damage, higher bills, or even leaks. Therefore, it’s best not to ignore the issue.

How to Cool Down a Hot Boiler Safely

If your boiler feels very hot or cuts out regularly, try the following:

  • Turn off the boiler and allow it to cool fully
  • Check for any radiator valves that are closed
  • Bleed radiators to remove trapped air
  • Inspect the pressure gauge – should be between 1 and 1.5 bar

If these steps don’t help, it’s time to call a Gas Safe registered engineer.

Preventing Your Boiler From Getting Too Hot

  • Book annual servicing to spot problems early
  • Flush the system every few years to clear sludge
  • Use inhibitor to slow limescale build-up
  • Check system pressure monthly

Also, keeping your boiler well-ventilated and not covering it helps it run safely.

Need Help With a Hot Boiler?

If your boiler is overheating or feeling too hot, contact Plumble for expert support in Kent. We serve areas like Canterbury, Medway, Gillingham, and more. Book a visit online or call 01732 622990. You can also check our reviews on Checkatrade to see what others say.

 

Tom Hewitt
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