The Vaillant Eco Tec mixture boiler is a state-of-the-art equipment designed to offer the person fixed sizzling water and heating as and when it’s wanted. There are a lot of completely different fashions to select from relying on what your wants possibly.A typical downside that occurs over time with most mixture boilers, and never simply with Vaillant boilers is lack of sizzling water. It begins off with the temperature modulating going cold and warm, finally stopping altogether.As we’re discussing the Vaillant Eco Tec Boiler I’ll take you thru a few easy procedures to examine earlier than you name in your native fuel protected boiler engineer.First we have to examine that boiler has adequate stress to work to warmth the water. On the entrance of the boiler, usually on the underside proper aspect you must see a stress gauge, this could learn round 1.2bar or simply above the purple space into the gray part.The stress will also be checked from the digital show window, press any button on the panel, the interior blue mild will come on, now press the button instantly beneath the radiator image, you’ll now see a bar image, press the identical button once more and you will note the digital stress. That is one other solution to examine the stress if you happen to suppose the gauge shouldn’t be working correctly.If the stress is right we now want to maneuver onto the subsequent examine, open a sizzling water faucet that’s closest to the boiler, now examine the boiler show, a faucet image ought to be displaying. If there is no such thing as a faucet image displaying then the aqua sensor possibly at fault and can must be checked by a boiler engineer.If the image is displaying then we all know the boiler is in sizzling water mode and the boiler ought to hearth as much as warmth the water.Because the boiler is heating the water you must see the temperature on the show begin to rise gently, if it rises in a short time and the boiler then shuts down, the temperature ought to fall and the boiler will then begin up once more.If that is taking place to your Vaillant Eco Tec then the boiler is overheating and shutting right down to cease any inside injury. This downside is generally as a result of sizzling water warmth exchanger turning into blocked or partially blocked with sludge.If the above appears conversant in your boiler, no matter make it possibly, you have to to contact a boiler engineer to exchange the new water warmth exchanger, and to flush the system out after which add inhibitor to cease this taking place once more.One other downside that occurs with many boilers and never simply the Vaillant Eco Tec is the new water solely works when the central heating is on. This downside is generally as a result of diverter valve both being caught within the heating mode or is defective and can must be changed.All boilers no matter make or mannequin today have to have common upkeep, and one of many essential checks that must be carried out is to examine that system has sufficient inhibitor within the water. It is all the time finest to prime the inhibitor up each time the annual service is carried out. Inhibitor will forestall sludge forming throughout the system.Sludge is the widespread killer of sizzling water warmth exchangers in all makes of boilers and never simply the Vaillant Eco Tec.All boilers if maintained correctly ought to be hassle free, however sometimes issues do occur. Round 90% of boiler breakdowns are usually because of different faults and never the boiler. They shut down to guard themselves from injury.In case you are beginning to expertise issues together with your sizzling water that’s heated via a mix boiler, I might advise you to name somebody in to examine the boiler over, do not go away it too lengthy because it may grow to be very costly to restore.