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My Boiler Is Too Hot

My Boiler Is Too Hot

 

My Boiler Is Too Hot – What Should I Do?

If you’ve noticed that your boiler is hotter than usual, it could be a sign of an underlying issue. An overheating boiler isn’t just uncomfortable — it could reduce efficiency or even trigger a system shutdown. At Plumble, we help homeowners across the region stay safe and warm. Here’s what to know if your boiler is running too hot.

Why Does My Boiler Feel Too Hot?

There are a few common reasons your boiler might overheat:

  • Trapped air or sludge: This stops hot water from moving properly, leading to excess heat.
  • Thermostat faults: If your boiler’s thermostat isn’t reading the temperature correctly, it may not shut off in time.
  • Broken pump: The pump pushes water through your heating system. If it fails, hot water builds up inside the boiler.
  • Limescale build-up: This is a common issue in hard water areas and can cause the boiler to heat unevenly.

Is It Dangerous If a Boiler Gets Too Hot?

Boilers have safety controls to shut down if they get too hot. While this helps prevent serious damage, it doesn’t solve the cause. If left unresolved, overheating can shorten the boiler’s life and make heating less efficient.

What You Can Do Right Away

  • Turn off the boiler and let it cool
  • Bleed your radiators to release any trapped air
  • Check if all radiator valves are open
  • Inspect your pressure gauge (ideal range is 1–1.5 bar)

If the problem continues, you should speak with a Gas Safe registered engineer for a full inspection.

Preventing Overheating in the Future

  • Get your boiler serviced annually
  • Install a magnetic filter to catch debris
  • Use inhibitor fluid to reduce limescale
  • Flush your heating system every few years

Need Help With a Boiler That’s Too Hot?

If your boiler is too hot or keeps shutting off, our team is here to help. Plumble offers fast, friendly heating repairs across your local area. Book online or give us a call on 01732 622990. Want to check our reviews? Find us on Checkatrade.

 

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