Water not staying Hot

[Daveoak]

My hot water system works OK, as far as the Radiators are concerned.
But the hot water isn't staying hot the whole time I have it programmed for, most of the time.
It seems that there must be a temperature that it comes back on to reheat the water, but this must be set very low and erratic, sometimes the water may only be tepid at a time of day it should be hot, and the next hot as it should be at that very same time of day.

I had thought it had something to do with the historesis on the hot water system but where can I change that ???

Puzzled

 

[oilman]

Would you like to read the topic at the top of this forum ? Then tell something about your water system other than it gets cold if it isn't working.

Niggled.

 

[Agile]

From what little you have told us it would appear that the cylinder stat has a too wide hysterisis gap.

You should measure the on/off temperatures with a digital thermometer.

But that diagnosis is based on VERY little information from you!

Tony