DIY advice needed

[Backtobackchat]

So having issues with my heating, one radiator won't work unless every other radiator is off.
The pressure guage is 1.5 and radiators were recently bled.
Has anyone had this issue and know how to fix it/ do I need to get someone out to fix it?
TIA

I am neither a gas safety engineer nor an experienced DIY plumber. I wonder if your pressure is a bit low and needs turning up https://www.edfenergy.com/heating/advice/boiler-pressure-everything-you-need-know

It might be worth trying the Property and DIY board.

Yes get someone out. 1.5 pressure isn't.low

If one rad only works when the rest of them are turned off your system might need flushing - basically silt in the rads stops the water getting through unless you turn the silted up rads off.

If they are silted up, re-pressuring could split the expansion vessel and cause leaks.

Get someone out to sort it.

I had this problem a few years ago.
First make sure ALL the rads are fully opened up.
Then turn the heating on and let it run for at least four hours.
On my system to do that I dial in 30 temp for every rad bc I have a specialised system.
Sometimes a bloody good run can help - could be an air lock in the system.
Get bleed keys from Amazon and leave one on top of every rad in your house.
I bleed my system carefully when it's on - using an old towel.
Even though I stay on top of it I recently found a landing rad where one half was full of air.