The DV and thermistor on my Worcester 9.24 have been replaced on my boiler after luke warm water being produced at the taps. Microswitches are firing the system. The hot water has worked for a week and I thought the problem had been solved. However, on the weekend the water has again reverted to luke warm status and i am at a loss as to what needs to be done next. I have been trying to get through the winter and replace the boiler next year. any advice would be greatly appreciated as young son in the home and hard work trying to shower all the time.