I have a Vaillant ECO max 828 E boiler.
Everything works fine but the only way to control the central heating is via the thermostat.
If I leave it to operate on the Time Switch it turns itself back on on at some point even though the Timer is telling it heat is not required.
I've fitted a new Timer but it has made no difference.
Any advice on this problem would be appreciated before I call in an expert.
Everything works fine but the only way to control the central heating is via the thermostat.
If I leave it to operate on the Time Switch it turns itself back on on at some point even though the Timer is telling it heat is not required.
I've fitted a new Timer but it has made no difference.
Any advice on this problem would be appreciated before I call in an expert.