pumping air

  1. A

    Is it normal for combi boiler to vent air for 30sec every few minutes?

    I had plumbing work done in bathroom. My boiler now keeps turning on for 25 seconds, i can hear it doing something like pumping air or gas or something out, and then stops for 8min and then repeats. is this normal and I'm just noticing it now and hadn't before? everything switched off in the...
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