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ravenheat csi85t combi boiler cuts off after a few seconds?

my ravenheat csi85t cuts off after afew seconds and there is a very loud boiling and air bubbling sound air release valve seems to be working but water has been forced out of the pipe at the air valve cant understand it any ideas

william
February 2009
RavenheatRavenheat CSI85THeating, Home Heating SystemsBoiler Combi Ravenheat
My csi 120 did the same!
see if the pressure clock goes way up when you try firing up the boiler.
If it does, then check the pump is running.

The plug connecting to the pump had become loose,it caused a rapid pressure rise when it fired up, and tripped the over pressure cutout.

Colin
February 2009
poss a massive air lock or the pumps not running

jim
February 2009

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Ravenheat CSI85T Boiler Cutting Out - Fixes