Hello,
I've had an old Worcester replaced with one of the latest Intergas + Opentherm.
New boiler works fine with DHW however the problem is with a CH.
It appears that boiler has very slow/weak pump - when I set a temperature on the thermostat to 30C boiler fires up for minute and then stops, after 2-3 minutes fires up again. The flow pipe from the boiler is very hot however the raidator are only slightly warm - despite having the TRV open to max.
I've never had a problem with CH before and radiators were heating quickly with an old boiler.
The boiler installer put some cleaning fernox cleaner into the system - somehow manually flashed it for a couple of minutes - but never open radiators when doing so - then they removed the dirty water, topped up Fernox inhibitor and filled out with the fresh water.
And now the question.
I started to think that Intergas boiler has either a very weak pump or the installer blocked pipes "while cleaning" which now causes a problem with the flow. This affects all radiators.
What do you think?
I've had an old Worcester replaced with one of the latest Intergas + Opentherm.
New boiler works fine with DHW however the problem is with a CH.
It appears that boiler has very slow/weak pump - when I set a temperature on the thermostat to 30C boiler fires up for minute and then stops, after 2-3 minutes fires up again. The flow pipe from the boiler is very hot however the raidator are only slightly warm - despite having the TRV open to max.
I've never had a problem with CH before and radiators were heating quickly with an old boiler.
The boiler installer put some cleaning fernox cleaner into the system - somehow manually flashed it for a couple of minutes - but never open radiators when doing so - then they removed the dirty water, topped up Fernox inhibitor and filled out with the fresh water.
And now the question.
I started to think that Intergas boiler has either a very weak pump or the installer blocked pipes "while cleaning" which now causes a problem with the flow. This affects all radiators.
What do you think?