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Why Does Your Boiler Keep Losing Pressure?

One of the most common calls we receive from homeowners is:

“My boiler pressure keeps dropping.”

Many people simply top the system up again and again, but in reality, this is usually a sign that something is wrong within the heating system.

Some of the most common causes include:

  • Faulty or flat expansion vessel
  • Pressure relief valve (PRV) passing water outside
  • Small hidden leaks under floors or pipework
  • Leaking radiators or valves
  • Automatic air vents leaking internally

Continuously topping up the boiler is not the correct solution. Every time fresh water enters the system, oxygen is introduced into the heating circuit, which can slowly create corrosion, sludge, and long term damage to components such as pumps, heat exchangers, radiators, and valves.

A proper heating engineer should investigate the root cause of the pressure loss instead of simply repressurising the system.

At SKAN Heating, we always aim to diagnose the actual problem correctly before recommending repairs.

Heating systems are not just appliances. They are complete systems that require correct diagnosis, proper setup, and professional understanding.

If you are constantly losing boiler pressure, let a professional find the root cause before it leads to costly damage.

Contact Yiannis at SKAN Heating on 07732 234 231 today for an expert diagnosis.

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