I've got a Vaillant eco TEC plus 837 that is constantly has the heating on, even though the thermostat isn't calling for it. Its not coming on full but maintaining around 42 - 54 degrees.
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Vaillant eco TEC plus 837 constantly on
- Thread starter DougQuaid0
- Start date
D
Deleted member 267285
Vaillant time switch?
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