Vaillant ecotec pro 28 F.61 leak repair

vaillant ecotec pro F.61 fault

This was a repair I did last week in Dodworth, Barnsley, S75. The boiler was a pre 2012 Vaillant ecotec pro 28 which had an intermittent F.61 fault and was losing pressure as it had a leak. I was able to repair this boiler with one visit.

The boiler kept coming up with the F.61 fault code which is not uncommon on the ecotec pro models. In this instance the fault turned out to be an issue with the printed circuit board(pcb) which needed to be replaced. I carry circuit boards for the first generation ecotec manufactured before 2012 and also for the second generation manufactured from 2012 onwards for service and repairs.

Vaillant ecotec pro printed circuit board repair

Vaillant ECOTEC pro printed circuit board

The second issue was that the boiler was dripping slowly from the diverter valve. This is also a common issue on the Vaillant ecotec models, the pin seal on the diverter fails causing it to leak. I find that they often leak the most when in central heating mode and will slow down to a very slow drip if left in hot water mode. If your boiler is leaking you could try leaving it in hot water mode to see if that makes a difference.

The last little minor issue was that the boiler was leaking slightly from the auto air vent at the back of the central heating pump. Like the pcb and diverter valve I also carry little components such as this for repairs.

Vaillant ecotec pro leaking diverter valve repair

vaillant ecotec pro leaking diverter valve

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Areas where I can repair your Vaillant ecotec pro combi boiler

areas that are covered

I cover a large part of South Yorkshire including most of Sheffield, Rotherham and Barnsley. I also cover a small part of Doncaster.


I cover most of Sheffield including central Sheffield, Chapeltown, Ecclesfield, Grenoside, High Green, Oughtibridge, Thurgoland, Wortley, Aston, Aughton, Swallownest, Todwick, Hillsborough and Stannington.


I cover the whole area of Rotherham including central Rotherham, Brinsworth, Catcliffe, Canklow, Masbrough, Treeton, Whiston, Greasbrough, Kimberworth, Thorpe Hesley, Rawmarsh, Wentworth, Bolton-on-Dearne, Goldthorpe, Thurnscoe, Wath-on-Dearne, Mexborough, Swinton, Kilnhurst, Hooton Roberts, Ravenfield, Thrybergh, Bramley, Hellaby, Maltby, Thurcroft, Wickersley and Braithwell.


I cover most of Barnsley including central Barnsley, Birdwell, Stairfoot, Worsborough, Kendray, Ardsley, Athersley, Monk Bretton, Lundwood, Royston, Brierley, Cudworth, Cortonwood, Great Houghton, Shafton, South Hiendley, Brampton, Darfield, Wombwell, Hemingfield, Elsecar, Hoyland, Jump, Barugh Green, Cawthorne, Darton, Dodworth, Gawber, Mapplewell, Pogmoor, Staincross, Wilthorpe, Worsbrough, Thurnscoe and Tankersley.


I cover a small part of Doncaster including central Adwick, Conisborough, Edlington, Warmsworth and Mexborough.