Vaillant ecomax overheating

Joined
28 Oct 2008
Messages
68
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0
Location
Hampshire
Country
United Kingdom
Hi guys I removed a radiator the over day and then refitted and refilled but could still hear air in the system. It's a gravity syste
Have turned the screws on the pump and nothing came out I even removed the whole screw but nothing... Now the boiler is overheating f5??? Any ideas?
 
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