New oil boiler and not heating radiators

[Unregistered]

I've had a new oil boiler installed but not working correctly

In the old boiler there was four pipes connected, 2 flows and 2 returns, one flow and return used for upstairs heating and the other flow and return for 2 zones downstairs, and the plumber connected both flows together and returns together before entering the boiler. All motorised valves appear to be working correctly.

There were 2 pumps being used, I assume on the return lines?

When first turned the boiler went into over temperature so plumber fitted a third pump after where the 2 returns joined and before entering boiler.

The radiators are heating a lot better but some are just hot at the bottom, and some not heating at all.

Is there a need for the 3 pumps or is one suffice now there is only one return line entering the boiler or is there anything else suggested?

Thanks in advance..

 

[rpm]

or is there anything else suggested?

Thanks in advance..

You`ve chosen a bad night to post without registering my friend, do that first and the guys here will respond.

 

[Geyser]

Yes register and put a photo up. I'm intrigued!

 

[magee34]

Thank you. Have now registered.

 

[SimonG]

At a guess I would say your plumber has fecked up.

 

[lame plumber]

probably need to clean the system, refill it getting all the air out and then balance it properly and unless you live in a mansion of 20 rooms plus one pump should suffice, they are probably fighting each other!