Remeha boiler backfiring?

Our remeha avanta plus 28c has just started making loud backfiring noises intermittently.It,s a bit worrying as it is like an explosion.What could it be ?
Dave, March 2016


done
Incomplete combustion allows gas to build up and it eventually explodes in an uncontrolled way making a loud noise.

You would do well to have your appliance serviced.

Good Luck..., March 2016
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