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It's not going above 42 degrees. Burners on. Have checked thermostat and it's working fine. It ramps up every now and temp goes to 50 odd and then ramps straight back down and temp goes back to 42...????
Discuss Vaillant ecotec Plus 428 in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Hot water
Your in bother now Jay
Sounds like it's been adjusted to low output or something's if possible... or maybe a sludged is hex.?
Yeah the vaillants are complicated, any chance the max flow was adjusted to 50 by mistake?
I meant sludge in hex as Iv had them kettle a lot with that silly spiral hex, but the flow went up 70 & then shut down & ticked over on minimum from memory...
The heat exchanger on the 4 series is not as bad for blocking as on the 6/8 series although anything is possible, as for your original problem i suspect that when the boiler is on and struggling to reach over 42* the status code would be S53/54 and would be down to the temperature rise when first starting up........ Ie so many degrees in so many seconds etc etc, if it doesn't see the correct rise it will drop its power too a lower output for approximately 20mins before re trying, and so on and so on, this is can also be accompanied after 5 failed attempts with a corresponding F codes but not always ...... And as previously mentioned is down to circulation wether it be appliance or system
There are always status codes?????? Not visable without looking but there all the same and without them you wouldn't know what the boiler was doing
You've got to press the i button........ Then it will show 5.(then a number) that's what tell you what the boiler is thinking so too speak
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