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I can hear the pump spinning, and I don't fancy getting scalded. When I turned off and let the system cool down I took the vent off fully and got covered, it was ok with warmish water but not hot water! When I took it off I used a screwdriver to turn the pump freely.

I haven't vented the Hot water circuit as I haven't really touched it and it was working fine beforehand. I put in a wilo pump because it was given to me.

Yes they are gate valves, and I did wonder if they weren't opening properly, I may opt to replace them tomorrow. Yes I put the arrow pointing the same direction. I haven't been tempted to take the vent plug fully off the pump when running because of the water jetting out!

I have had to replace a seized Grundos CH pump with a Wilo gold 50, the problem is that when I have tried to get the heating back on, after filling and venting the system I have no flow of hot water to my rads. The pump is running as I can hear the noise change when the speed is changed, inlet...

Hi, I have a hot water/central heating system that is generally ok when running, although there is some noise which seems to be the pump. The system is on a timer which goes off at 2130. Just recently, most mornings between 0100-0400 there is an intermittent noise that starts coming from the...