Get a plumber to trace your cold water lines to find out where the heat is getting into the line.
Call a plumber.
If a hot water pipe is leaking then it will definitely affect the amount of hot water you have, -This is costing you a lot in heating, get it fixed ASAP
it depends on what your hot water level is
get a plummer to look at the problem
I assume you mean "When your hot water needle does NOT work." Thermostat.
If hot water is supplied from boiler, a clogged domestic coil is often problem. If water heater supplying hot water, a clogged hot water line somewhere in hot water main.
no
Maybe u have a plubing problem
there are many possibilities. If you had your hot water heater replaced or fixed a water line then it could be air inside your water pipes and should go away after a while. you could have air still inside your water heater tank and when you first run hot water out of a fixture it could from flow bleed into your hot water pipe. If you think it isn't caused by air then your fixture can be the problem either your valve seal is loose or your aerator is bad. If you can find out either its air or water then it would easier to trouble shoot.
im not very knowledgable with volks but there may be a water pump problem, or a radiator problem,is the radiator circulated the cool water from iit to the block that has hot water in it?
The valve stem and/or washer on the cold side needs to be fixed.
have the heaters check, i had the same problem but fixed when changed heaters.
Yes , a major problem with fiberglass