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Pump seems to be running. It's vibrating and carries on going for a bit after the boiler stops, like it's sposed to. Do I need to be a bit more patient with bleeding the pump? Is it supposed to do the same thing as when you bleed a radiator?

OK, I tried that and maybe I was impatient but still didn't get anything out. I'm sure there might be some other reason for my heating sounding like it's going to take off so if there's any other suggestions I'd love to hear them. It does honestly sound like there's a load of air moving...

Mr Gassafe: really? Everything I've read says to turn the pump off. I'll give it a go tho. Thankyou

Can anyone help? A week ago I put Fernox F3 cleaner in my system because it was really noisy. I then emptied and flushed out the system a couple of times. I've done the final filling including Fernox inhibitor. It now sounds like there's a load of air moving through the pump. I've bled all...