Hi, I have Vaillant Ecotec 831 plus. When I turn the boiler on, within 10 seconds the fuse box gets tripped and the electricity turns off downstairs. I've previously fixed the diverter valve twice, 8 months ago and 3 years ago. Saw F75 error yesterday and assumed valve might have broken again. Today the boiler started to trip the electrics which it never did before. I can't see a water leak from underneath the valve at all. Have spotted a tiny amount of water near the pump area though. Also spotted water leaking from the right side of the boiler, towards the back.
At the bottom of the pump itself it's all frothy and scummy, like a scuzzy kind of foam. Almost looks like someone sprayed a thin layer of shaving cream on the bottom of the pump. I don't know if this is natural build up over time, or is it a sign of pump failure and could be what's causing the electricity to trip out? Researching earlier I read that pump seals can cause electricity to trip?
Extra info: I know I need to replace my heat exchanger too as the hot water goes hot, cold, hot when first turning on the tap. And I think I might have to work on or replace the expansion vessel because I had to get the pressure quite high for the boiler to run properly (about 2.0 bar). Could those two issues play a part in this new problem with the electrics shutting off?
At the bottom of the pump itself it's all frothy and scummy, like a scuzzy kind of foam. Almost looks like someone sprayed a thin layer of shaving cream on the bottom of the pump. I don't know if this is natural build up over time, or is it a sign of pump failure and could be what's causing the electricity to trip out? Researching earlier I read that pump seals can cause electricity to trip?
Extra info: I know I need to replace my heat exchanger too as the hot water goes hot, cold, hot when first turning on the tap. And I think I might have to work on or replace the expansion vessel because I had to get the pressure quite high for the boiler to run properly (about 2.0 bar). Could those two issues play a part in this new problem with the electrics shutting off?