noisy h/w pipes!!!!

[johnnyc]

Hi everyone ,new here,hope someone can help

When my boiler first fires up (After being off for some time-overnight), there are banging noises like air in the pipes,for the first 10/20 seconds,this is when the controller is set to h/w only, so I guess that must count out the heating?.When the boiler is running there is no noise at all.problem is we are emigrating soon and may be selling the house to an investment company.Obviously if we sell through estate agents we are going to have to fix this.if we sell to investment i'm not bothered. anyone any ideas.
Boiler -Baxi inset 2 back boiler.
Thanks
John

 

[jackal92]

Hi everyone ,new here,hope someone can help

When my boiler first fires up (After being off for some time-overnight), there are banging noises like air in the pipes,for the first 10/20 seconds,this is when the controller is set to h/w only, so I guess that must count out the heating?.When the boiler is running there is no noise at all.problem is we are emigrating soon and may be selling the house to an investment company.Obviously if we sell through estate agents we are going to have to fix this.if we sell to investment i'm not bothered. anyone any ideas.
Boiler -Baxi inset 2 back boiler.
Thanks
John

Hi John
I'm not sure what that could be but it sounds like air.Do your radiators need bleeding?.
Jack

 

[corgiman]

what boiler do you have?

 

[JohnD]

Is the circulation to the hot water cylinder pumped or gravity fed?

 

[johnnyc]

Thanks for the replies.
The boiler is a Baxi inset 2 Back boiler,I think it must be gravity fed as there is no pump I can see just two large pipes going to the cylinder in the loft,the pump only runs when the heating is turned on.
John

 

[JohnD]

If you are sure the pump is not running when the boiler fires up for hot Water, then it could be steam bubbles colapsing from boiling inside the boiler, faster than the circulation can carry it away.

I'm not familiar with Baxi Back boilers so better not fantasise about the cause. But are you in a hard water area, and do you know if there is inhibitor in the circulating water?

 

[johnnyc]

we are in northumberland which I think is a soft water area,I don't know about any inhibitors in the system.I think i'm going to try to turn the temperature down but leave it on continuous ,this should keep the circulation going and stop bubbles forming?. worth a try anyway.
John