HW won't heat

Joined
7 Oct 2008
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Location
Cardiff
Country
United Kingdom
Hi guys

Changed a cylinder the other day refilled heating works fine, hot water won't heat. No 2 or 3 prt valves. Has air lock I think just can't get it out any tips would be welcome
 
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Are you a DIYer,or plumber???

this type of problem is usualy caused by only partial drain down. on a vented system,

Is it vented or sealed??? you dont say!!!

If its vented then drain down to the lowest point,

eventualy it will pull the air out when it runs clear stop draining and it will refill no promblem.
 

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