Heating but no Hot Water

[andyssmith]

I myself am a technical numptie and have the following question:
Heating is working fine but this morning I have absolutely no hot water.
Could this be a simple problem I can sort myself or do I need expert help and re-mortgage the house ?
Cheers anyone that can help.............

 

[breezer]

i am not a plumber or heating engineer, but our "boys" will want to know the following

type of system
combi or not (do you have "an airing cupboard" with large copper cylinder in it)

make / model of boiler

Have you had any thing changed recently (if so what)

does any water come out the hot tap (even if its cold)

for my 2p worth i would say its the "diverter valve" but wait and see

 

[andyssmith]

It's all sorted - thanks to Breezer for taking the time to type....but...
It was my header tank (the little one) - due to the extremely warm summer my ball shaped object attached to a bar of metal (sorry but the name escapes me) had stuck in the up position, thus not allowing any water to go into the tank.
My excellent boiler servicer just told me over the phone to lower the arm manually to fill the tank.
This done, no cost, great bloke and I'm very happy again.
Cheers.