Not all rads working after having new pump installed

[rubito]

Hopefully some of you kind folks can help me with this one:

A couple of weeks ago the pump on our central heating went and we had it replaced, however since it has been replaced only the two radiators upstairs and the one in the hallway are now working. Before we had the pump replaced all of the radiators were working ok.
I have tried bleeding the rads that are cold but to no avail.

Any suggestions greatfully recieved.

 

[JohnD]

Have a look at the speed setting on the pump and see it is set to Min (or "1")

 

[pannierstan]

Probably airlocked as the guy didnt have a clue. Either that or he snapped the gatevalve stem and its only just letting a little water through.

What sort of pump is it as the first thing might be to vent it.

Then you might want to check if the cold feed is blocked and in fact the pump doesnt have much water to pump.

Get the feeling you might be better giving him a call and asking him to come and finish the job properly.

Stan

 

[wilhelm]

i would have a look at gatevalves as well. maybe full of sh yte. or as stan says. snapped.