Hi . what pressure do you have on the boiler gauge ?
The pressure bar is between the two dotted lines on the display.
Which I understand is correct
Ok . if hot water is running ok and the heating comes on but is lukewarm then your heating temperature sensor/thermistor is faulty and needs replacing
Ok is that on the boiler or the thermostat unit?
On he boiler
Your room stat is turning the heating on and they tend to be other work or not , so it will be your boiler heating temp sensor
Ok I see thanks, ***** ***** it replaced