Booster pump installed successfully, but now boiler goes to overheat!

[Darren Jackson]

Marc K, why the dislike? I was only trying to offer some friendly advice!

 

[Vitali]

Hi people, I guessed it was something simple and it was... The valve just before the circulation pump got stuck and hot water from the boiler would not get into the pump. It was less then half open and would not open fully. The other valve straight after the pump was not in the best condition. It took a good bit effort using the "convincer"/hammer to disconnect the pump and replace both valves and it's all perfect now.
Thanks to all your suggestions and advice!

 

[Darren Jackson]

Glad you got it sorted mate, and also pleased I was correct that the gate valves had not opened back up correctly. Still don't know why I got the dislike for suggesting it though from Marc K? Funny old world!

 

[Vitali]

Yes, Darren, you were right, because I am an amateur I didn't know that was a gate valve by the pump (the one with a small screw-like shutter you open/close with a flat end screwdriver. I genuinely thought it was air release valve and twisted it myself, noticed a small leak and tried to screw it back but it wasn't going back fully. When the plumber disconnected it altogether I saw that it was a gate valve full of black burn inside. Anyway, my silly mistake, shouldn't have touched it. Don't worry about the dislike, I will balance it out now by liking your comment . Thanks!