Thank you for choosing an ARISTON boiler. Aristons only obligation under the guarantee will be to repair or repla- We guarantee that your boiler is a reliable and ce the faulty appliacnce at Aristons discretion. Page 71 It ensures the building stays at the ideal temperature, whilst saving energy. The principle is that the water temperature at Ao1 is caused by the flame sensor been too close to the burner tray which sometimes when the boiler tries to light the spark jumps off the tray to the flame sensor then travels down the line to the pcb which in turn shorts out 1 or 2 diodes on the board. Donald Mcnaught explains the repair at the top. As the previous trader said. It's probably your boiler either pre warming the water for your next use or it could be your boiler adjusting the temperature of your rooms. Check your thermostat settings. It might be useful to invest in a smart boiler system such as Nest or Hive. Hope this helps. Your boiler will have either a dial to control the flow temperature or some buttons and a digital display. You’ll probably need to open a flap on the boiler to access this – don’t worry, you’re allowed to open the flap. If you have a conventional boiler with a hot water cylinder, then there will be just one dial or setting to adjust. No heating and hot water mean a hell of a single or a plethora of boiler and non-boiler-related reasons. Anything from a burner blockage to low gas pressure endangers the safety of your and sky-rockets your bills. Still, if you are lucky enough, a boiler ignition failure could be easy to detect and solve. . 3. To Set the “On” and “Of ” times. The clock uses a 24hours system. e.g. 8 = 8.00 am and 18 = 6.00 pm “ON” periods are set by sliding all tappets between the “ON” time and the “OFF” time to the outer edge of the dial. The tappets remaining at the centre of the dial are the “OFF” periods. 4. I have an Ariston 20/1 MPS combi boiler - at least ten years old. A few weeks ago, it stopped firing consistently. Most of the time, it worked ok, but sometimes it wouldn't fire at all, especially if I wanted hot water while the central heating was on. A few days ago, it stopped firing altogether. An engineer diagnosed a faulty flow switch (I Or, alternatively, the small microswitch inside the the motorised valve that is responsible for switching the boiler 'on' in 'heating' mode is not doing so. In which case the valve will be opening but not switching the boiler on. In this case a new valve or valve actuator will resolve it. B. If your boiler is making a humming noise or vibrations when the heating is on, it could be due to a build-up of sludge or limescale. This can often happen in older homes, or if you live in an area with hard water. Ask your heating engineer to add a central heating inhibitor, a scale reducer (in hard water areas), or a boiler filter to help With that in mind, if you have a hot water tank, then your hot water flow should be at least 60C and your hot water tank should be set to store water at this temperature. This is because this is

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