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Maintenance

5 Signs Your Boiler Is About to Break Down

Don't wait for a complete breakdown. These five warning signs mean your boiler needs attention soon.

8 July 2025·4 min read·By Corby Boiler Installations

Warning Signs Your Boiler Is Struggling

  1. Yellow or orange flame: Should always be crisp and blue. A yellow flame indicates incomplete combustion — potentially dangerous. Call an engineer immediately.
  2. Increased energy bills: If your gas bill has risen without a change in usage, your boiler is working harder than it should — a sign of inefficiency.
  3. Frequent pressure drops: Needing to repressurise every week suggests a small leak. Have it investigated before it becomes a big leak.
  4. Unusual noises: Banging, kettling, gurgling, or whistling all point to system problems. Ignore them and they'll get worse.
  5. Repeated lockouts: If you're resetting the boiler more than once a month, something is wrong. Get it diagnosed before the boiler fails completely.
#breakdown#warning signs#maintenance

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