Discuss Vaillant boiler change in operation in the Central Heating Forum area at PlumbersForums.net
Thanks for the feedback.The boiler is cycling. Ie. Cutting in and out too frequently. The egg timer is in effect blocking the boiler from firing, until the anticycling time limit has passed.
I was just wondering why the boiler is suddenly recycling after being on for such a short period.Thanks for the feedback.
Happens every time the boiler fires up, when room temp drops below desired temperature. Flow temp set at 75 degs. Only happens the once, and then boiler operates normally after a few minutes until desired temp reached. Boiler is Vaillant ecoTEC plus 418.Is this happening at its first startup say in the morning or is it after a zone shuts or TRVs start closing in with boiler on for some time?
Its probably exceeding its target temperature by 5C and going into recycle, what is the target temperature set to?.
What model Vaillant?.
Bit more info. If I bring boiler on by turning room stat up, boiler comes on until it reaches 75 degs. If I wait until room temp falls below room stat setting, boiler comes on only for 30 secs by which time it has only reached around 35 degs and then goes off and egg timer symbol flashes for a few minutes before boiler comes on again until it reaches 75 degs.Happens every time the boiler fires up, when room temp drops below desired temperature. Flow temp set at 75 degs. Only happens the once, and then boiler operates normally after a few minutes until desired temp reached. Boiler is Vaillant ecoTEC plus 418.
Stat is Honeywell T4360. Need a bit of time to try and work out answers to questions in post 7. Thanks for info so far.What is the make/modelof the roomstat?.
Can you also have a look at post #7.
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