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Central Heating Pump High Pitched Noise
Posted: Fri Mar 20, 2020 2:22 pm
by Robh1990
Hi guys I've got a DAB Evosta central heating pump and lately its been making a high pitched squealing kind of noise which travels through most of the heating system. I've turned the bleed screw and doesn't seem to be any air in there. Bled all the radiators.
Any ideas, I'm grateful.
Re: Central Heating Pump High Pitched Noise
Posted: Fri Mar 20, 2020 6:55 pm
by stoneyboy
Hi Robh1990,
Sounds like you have air in the pump - you need to remove the central bleed screw completely to clear the air, have a cloth ready to catch the escaping water.
Regards, S
Re: Central Heating Pump High Pitched Noise
Posted: Mon Mar 23, 2020 8:38 am
by Robh1990
stoneyboy wrote:Hi Robh1990,
Sounds like you have air in the pump - you need to remove the central bleed screw completely to clear the air, have a cloth ready to catch the escaping water.
Regards, S
Turn the pump off first? Do I need to close off the water either side of the pump? Or just open the screw until it runs dry?
Re: Central Heating Pump High Pitched Noise
Posted: Tue Mar 24, 2020 12:16 am
by stoneyboy
Hi,
Probably better with the pump running and valves open.
Water should come out around the pump shaft once the air has cleared.
S