Hi everbody I have a potterton prima boiler it runs hot water and central heating. My problem is when its been running cental heating,it gets air in the system but i cannot find any leaks. If left to stand say overnight when it starts you can hear the pump straining.someone suggested sludge but does this create air. im new to this plumbing lark so all info would be most appreciated. Thank you
central heating
- Thread starter harrison_633
- Start date
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sludge can create air, it can be drawing air through vent pipe.
if its straining it could be on it's last legs.
check the bottom of your f/e tank in loft for sludge in bottom.
if its straining it could be on it's last legs.
check the bottom of your f/e tank in loft for sludge in bottom.
then get bg to do ya a £600 flush 
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Hi thanks for your reply.i've checked the tank it has a light covering of brown stuff in the bottom is this sludge,or something else. my neibour is telling me its not the pump thats noisy its the three port valve is this possible as it only has water going though it.thank you
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