This was a repair I did on a Vaillant System boiler which was an ecoTEC Plus 637, for a customer in Sheffield S10 this week. The issue being that they had no hot water and no central heating.
Tag: pump
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.