Vaillant ecotec plus 831 pump replacement

This was a repair on a Vaillant ecotec Plus 831 in Sheffield, S11. The pump was still working but was failing and was making a rumbling noise at certain speeds.

On these models the pump can vary its speed depending on the load on the system. As such I have found that often they may run quietly until they run at a certain speed at which point they can be quite loud.

Vaillant ecotec F.75 repair

This was a repair I did on a Vaillant ecotec pro which had stopped working altogether. The display was showing the dreaded, yet extremely common F.75 fault code. The early versions of the ecotec boilers were fitted with problematic pumps and early versions of the pressure sensors also suffered from issues.