Megaflo water tank- no hot water

[Mylasiddique]

Hi everyone,

The water in the apartment is not heating up hot, it’s either freezing cold or lukewarm. The red and yellow lights on the grundefos pump suggest in the manual that there’s a blockage. We’ve tried resetting the tank and the grundefos but to our dismay, we thought after doing all this yesterday the tank may heat up overnight but sadly not

The pipe itself attached to the grundefos is hot so unsure where the problem lies

 

[ShaunCorbs]

Pressure in the system should be above 1 bar ?

Maybe pump stuck Turn the programmer to off eg heating and hot water both off there’s a hole in the centre of the pump that deep down in side you will see a pozi screw when there’s no lights on the pump insert a screwdriver down and onto this pozi and push it towards the cylinder and twist clockwise a full turn