Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: Vaillant Ecotec combi boiler -
The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.
What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.
A good place to start might be the flow switch (usually in the bottom of the boiler, where the cold water supply comes in) or the electrical connections to it.
Posted on Oct 07, 2008
SOURCE: hi,i have a vaillant turbomax
I had this. Open up the main case, take the second inner case front off to expose the boiler.
Clean the thermocouple which detects the flame being lit with some steel wool held with needle nose pliers. It will be all sooty and will turn off the gas as a safety precaution if it does not detect heat fast enough.
Don't listen to the gas man who will say "needs a new circuit board mate" as this is usually a stock response.
Posted on Jan 05, 2009
SOURCE: f20 error on vaillant eco28
F20 is a flow sensor error. Can be due to a defective sensor/ not correctly fitted, or you may have poor circulation, a big difference in flow and return temperatures, can sometimes make the boiler think it has a defective sensor, check good circulation through system, or if you have thermostatic radaiators valves on every single radiator, take 1 head off, as if you dont have a bypass fitted, it needs a radiator as a bypass circuit
Posted on Mar 03, 2009
SOURCE: Vaillant combi boiler problem
when the tap is turned on and the water light on the boiler doesn't this means the diverter valve is not operating it could be down to low water pressure in the house this can be checked at the cold tap in the kitchen. if there is plenty of pressure then it could be the diagphram in the diverter valve is worn or split. the diagphram is only a few pounds but it depends on the engineer you get as to how much money he wants to fit it.
the egg timer symbol (or two pyramids together) is an ignition indicator turn off and on again to see if it will fire with the tap running. reset the boiler with the lower right hand control knob.
Posted on Mar 26, 2009
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