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
many times the feeder tube from the bottom of the tank becomes perforated. the return tube is ok most of the time . try switching the 3 8 tubes from inlet to outlet and see if problem resolved. if so the the tube down into the tank is flawed.
Posted on Nov 01, 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: we seem to have developed
it seams the valve that senses water flow is not operating properly,causing the boiler to keep heating the water when it has nowhere to go,i,e the taps turned off,thus boiling the water.
Posted on Jan 12, 2009
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