pump strange

[ruth0007]

hi

should you be able to hear the water running through a pump as you can with mine and the downstairs radiators are cold

thankyou for your help

 

[oilman]

No,it means there is air in the pump as well as water.

 

[ruth0007]

how do you bleed it

 

[monkeyboy67]

First of all remember to switch the pump and boiler off before doing anything. Bleed the rads in the normal way (i.e. crack open vent valve on top of each rad until you get a sustained flow of water). If you have an airlock I found the following tip very useful. Find a rad with a drain outlet, shut off both sides of the rad, you’ll need a pair of pliers or a very small spanner to close one side. Put a hose pipe on the end of the drain outlet (or use a bucket) and then open ONE of the valves, you may hear some gurgling for a short while. Close this valve and do the same on the other side of the rad – only open one side of the rad at anyone time. You may have to do this process 2 or 3 times. Close valve and close drain. Open up both valves again. You may like to check that your feed and expansion tank is filling the system while you are doing this as it’s from here that the lost water is replenished. To pressurise the system you could close all the control valves on each rad except one. Set the boiler off running and let run for 20 mins. Slowly crack open each rad until all rads are fully open. If you still have rads that are cooler than the rest then its likely that you have a balancing problem (see ref sticky for common problems), you have a restriction or blockage in your pipe or the pump is knackered. I am no plumber and someone will undoubtedly question my method but it’s worked for me.
MB67