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Once this has been checked the appliance may be repressurised with water.
The pump is lubricated by the central heating water, so when you fill the boiler back up you want to bleed this as properly.

Annual boiler servicing permits you to catch any issues early on and earlier than they've an opportunity to escalate into full-blown system failures.

A service like this shouldn’t value you more than £100 – and potentially a little less if you’re primarily based in the North East.

Even easy issues like a hot tap that is too heat could be altered by a service to make it extra bearable for every day use.