hi, I'm having a problem with my vaillant boiler.
the problem started a couple of weeks ago, where i had problems getting it to run at all. We had it serviced & the fan replaced. A few days later we had the problem that the heating would not turn off & had a new programmer fitted (old one was mechanical & i think this just happened to be coincidence). Now heating works fine, but we have a problem with the hot water still (the water problem was there to begin with, its the only thing not working after the service/fan/programmer). Here's what happens.
Water is luke warm
press reset button - water gets hot (around 68 degrees showing on boiler)
run heating, then run water - water doesn't get hot (around 50 degrees showing on boiler)
run heating, wait for over-run to stop, then run water - water doesn't get hot (around 50 degrees showing on boiler)
run heating, then press reset - water gets hot (around 68 degrees showing on boiler)
the problem started a couple of weeks ago, where i had problems getting it to run at all. We had it serviced & the fan replaced. A few days later we had the problem that the heating would not turn off & had a new programmer fitted (old one was mechanical & i think this just happened to be coincidence). Now heating works fine, but we have a problem with the hot water still (the water problem was there to begin with, its the only thing not working after the service/fan/programmer). Here's what happens.
Water is luke warm
press reset button - water gets hot (around 68 degrees showing on boiler)
run heating, then run water - water doesn't get hot (around 50 degrees showing on boiler)
run heating, wait for over-run to stop, then run water - water doesn't get hot (around 50 degrees showing on boiler)
run heating, then press reset - water gets hot (around 68 degrees showing on boiler)