So I went to a job this morning, and customer complaining of intermittent heating, when I asked several questions, she said sometimes the white box (receiver) has a red light and flashing yellow light (switch). When checking it out it works fine. Boiler is Vaillant EcoTec pro 2012 ish model. I checked for a loose connection and ended up fitting a new receiver and handset, to include it 400mm away from boiler as per mi’s.
What I did notice was RT connection was going to common and live going to switched in the receiver end. Would this have been the cause, even though the fault has only just started happening?
What I did notice was RT connection was going to common and live going to switched in the receiver end. Would this have been the cause, even though the fault has only just started happening?
