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Cold rads-airlock?

this.lad · 2021-03-06 11:28:07

I have three cold rads in one area downstairs. There was some air in them which I bled out. They remain cold. However, when I bleed the rad, as I lose water, the flow pipe heats up, suggesting a blockage or airlock on the return side. How do i blow this out? I have turned all rads off and tried one of the rads at a time to…

06-03-2021 11:28am

#1

this.lad

Registered Users, Registered Users 2 Posts: 300 ✭✭

Join Date: July 2017

Posts: 292

I have three cold rads in one area downstairs.

There was some air in them which I bled out. They remain cold. However, when I bleed the rad, as I lose water, the flow pipe heats up, suggesting a blockage or airlock on the return side.

How do i blow this out?

I have turned all rads off and tried one of the rads at a time to no avail.

The system is topped up with water also, it's a closed system with an expansion vessel but I haven't gone near this...yet

Thanks

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