hot water not hot when c/h is on Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[robbo77]

in a morning set my water and heating to come on,when c/h is not on water is hot,but when both c/h and water on together the water is not very warm,also when i just have hot water on my rads upstairs become warm.does anyone have any ideas on this.
cheers

[plumbbob]

It all depends on system type, boiler size and type.