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Hello — if anyone's got any ideas on this one, I'd be hugely grateful!
Here are the details...
I live in a small one-bed flat (on one level). Last year I had the water tanks and immersion boiler removed and replaced with a Vaillant EcoFIT combi boiler. The fitters rerouted the pipework as necessary and gave the system a powerflush.
There are three radiators in the flat. No thermostatic valves. The smallest, in the bathroom (45cm x 45 cm) was always the hottest, while the other two rads (living room and bedroom) got warm, but not that warm. I tried balancing the system but it didn't make a difference.
The small bathroom rad needed fully bleeding pretty much every week. It's an old rad, but having to fully bleed it every week seems a bit excessive. I tested with a taper and the gas was flammable (so, hydrogen?) The other two rads never needed bleeding.
You'd think that with all this excessive bleeding, the pressure on the boiler would go down, but weirdly it continued to rise. It got to 3.2 so I released some pressure from the small bathroom rad and balanced the pressure on the boiler. Since then, the small rad has continued to work, but the other two rads don't heat up at all anymore.
A plumber from the company who fitted the system came to service the boiler (no problems there) and tried to clear what he presumed was an airlock, but it didn't work. He left mystified.
I'm guessing it's an airlock too, which this video demonstrates a method to clear it —
I can do that, but that won't address the underlying issue of what's causing the problem in the first place. If anyone's got any ideas so I can go back to the fitters with an educated theory for them to sort out, that'd be a massive help.
One other thing that might be worth noting is that the left-hand valve under the boiler was left open by the fitters (Circled in pink in attached photo). Should it be closed, like the one on the right?
Thanks in advance!
Ian
Here are the details...
I live in a small one-bed flat (on one level). Last year I had the water tanks and immersion boiler removed and replaced with a Vaillant EcoFIT combi boiler. The fitters rerouted the pipework as necessary and gave the system a powerflush.
There are three radiators in the flat. No thermostatic valves. The smallest, in the bathroom (45cm x 45 cm) was always the hottest, while the other two rads (living room and bedroom) got warm, but not that warm. I tried balancing the system but it didn't make a difference.
The small bathroom rad needed fully bleeding pretty much every week. It's an old rad, but having to fully bleed it every week seems a bit excessive. I tested with a taper and the gas was flammable (so, hydrogen?) The other two rads never needed bleeding.
You'd think that with all this excessive bleeding, the pressure on the boiler would go down, but weirdly it continued to rise. It got to 3.2 so I released some pressure from the small bathroom rad and balanced the pressure on the boiler. Since then, the small rad has continued to work, but the other two rads don't heat up at all anymore.
A plumber from the company who fitted the system came to service the boiler (no problems there) and tried to clear what he presumed was an airlock, but it didn't work. He left mystified.
I'm guessing it's an airlock too, which this video demonstrates a method to clear it —
I can do that, but that won't address the underlying issue of what's causing the problem in the first place. If anyone's got any ideas so I can go back to the fitters with an educated theory for them to sort out, that'd be a massive help.
One other thing that might be worth noting is that the left-hand valve under the boiler was left open by the fitters (Circled in pink in attached photo). Should it be closed, like the one on the right?
Thanks in advance!
Ian
