Hot water cylinder barely warm

[NewhouseOldhouse]

Hi

When I switch my heating on for 45 mins for hot water only the pipe going into water cylinder is piping hot but water in cylinder is only bearly warming up.

Any ideas?

Thanks

 

[Madrab]

Is the water even warm coming out? Sounds like an air lock or a blocked up coil.

 

[NewhouseOldhouse]

Is the water even warm coming out? Sounds like an air lock or a blocked up coil.

I never even checked the water coming out just get the water cylinder middle and top

 

[NewhouseOldhouse]

There is an awful lot of corrosion around the 2 pipes in/out of the water cylinder

 

[NewhouseOldhouse]

This is the pipe going into the water cylinder which is piping hot when heating is on


This is the lower pipe coming out of the water cylinder

 

[cross thread]

Try the top valve is open and get a magnet and place it around the supply pipes if it sticks to the copper it’s got a restriction .

 

[dilalio]

Some more photos further back/wider angle. Does the lower pipe ever get hot?
Where does that 15mm pipe come from/go to?

 

[NewhouseOldhouse]

Try the top valve is open and get a magnet and place it around the supply pipes if it sticks to the copper it’s got a restriction .

Is this the valve you are talking about



That's the lower of the 2 pipes.

 

[NewhouseOldhouse]

Some more photos further back/wider angle. Does the lower pipe ever get hot?
Where does that 15mm pipe come from/go to?

Lower pipe can be lukewarm just but only lukewarm.

15mm has been stop ended just below.

 

[Madrab]

Is this a new issue, anyone been playing with that valve?

 

[NewhouseOldhouse]

This valve?

 

[NewhouseOldhouse]

Not sure but I know the fire back boiler has had 2 valve switched off as it was taking the heat rather than pushing heat to rads.

I don't intent to lite fire just deciding if I should remove the back boiler

 

[Madrab]

Yes, presuming that's the return from the cylinder to the boiler. Has this now happened since the valves were shut down on the BB? Is this gravity fed, bit small but never the less. Who shut down the valves and did it stopped working after they did that, if so I'd get them back and get them to sort it.

Take the red insulation off of the cylinder or pull it back as far as and clear everything away to reveal as much of the cylinder and pipework as possible and take a couple more pics, the whole install and closer up of each section of pipework

 

[NewhouseOldhouse]

Just checked that valve and it was closed.

Should this be open?

 

[Madrab]

Take the red insulation off of the cylinder or pull it back as far as and clear everything away to reveal as much of the cylinder and pipework as possible and take a couple more pics, the whole install and closer up of each section of pipework

Lets have a look at everything first ... show us localised pics of all the pipes entering/exiting the cylinder and some a little further out, leave that valve shut just now.