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Where is the sump & How do I drain this off? The water noise, kind of trickles. Also when the burner is trying to come on, there is a noise sounds like blowing air through a tube, but the pressure rapidly fluctuates. Thanks.

Hi, This problem seems slightly different that those described so far on here.... I have a Powermax 155x, when I switch it on, I hear a glugging noise - possibly water, the burner attempts to come on maybe three times, just flicks on then off, then the lock out light comes on. My...

I also have a intermittantly whistling powermax 155 (usually at 6am when the burner comes on, then randomly throughout the day). Where is this air/gas mixture screw? Which direction should it be turned, and how much? I live on a estate built 5 years ago, all with this boiler, and you can...