oso 20 direct no hot water

[Class of '55]

Hi guys. 1st time post so pls be gentle. I recently went to a oso 20 rd unvented cylinder. No hot water but good flow to all outlets. Checked out all preliminary electrics and all ok to primary element (none to Eco7 but apparently this does work so hot water mornings only). Cut out hadn't popped. Good pressure thru-out What would be the most likely cause, stat failure or p & t assembly, or could it be the element itself . . . or am i barking up the wrong tree completely. Cheers

 

[ChrisR]

What did you do to test the main element?

Are you registered to work on Unvented Hot Water Storage Systems?

 

[Bamber gaspipe]

Hi guys. 1st time post so pls be gentle. I recently went to a oso 20 rd unvented cylinder. No hot water but good flow to all outlets. Checked out all preliminary electrics and all ok to primary element (none to Eco7 but apparently this does work so hot water mornings only). Cut out hadn't popped. Good pressure thru-out What would be the most likely cause, stat failure or p & t assembly, or could it be the element itself . . . or am i barking up the wrong tree completely. Cheers

Sounds like your unvented is a direct cylinder with two heating elements one of which seems to be knackered.