- 26 Nov 2011
- Reaction score
- Hertfordshire & London
F75 kit is with a sensor but it is near heat exchanger not near the pump.http://www.ebay.co.uk/itm/Valliant-Service-Kit-F75-0020023720-/321754096597?nma=true&si=E%2FyB%2FZo7rmyYmSI5WPPk%2B%2F0BisE%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
I reckon someone has installed the f75 kit(with sensor) and not removed the old sensor.