Central heating water pressure problem


I have a Vokera Mynute 28e system boiler. The boiler does heating only. The
boiler is 2 years old.
The boiler has been working fine until recently.
The gauge on the boiler shows, when cold, a system water pressure of just
over 1 bar.
Lately the system has been losing water pressure. What is happening is this.
The heating comes on and the gauge on the boiler slowly creeps up to 3 bar
when the pressure relief valve opens and water is discharged to outside. The
thermostat on the boiler seems to be working ok and shuts off the gas at
55c.
Any idea why this is happening?
Regards.
DAB.
Reply to
bramfield
I have a Vokera Mynute 28e system boiler. The boiler does heating only. The boiler is 2 years old. The heating system is a pressurized system.
The boiler has been working fine until recently.
The water gauge on the boiler shows, when cold, a system water pressure of just over 1 bar. The air pressure inside the expansion vessel has been checked with the system empty of water, the air pressure is just under 1 bar.
Lately the system has been losing water pressure. What is happening is this. The heating comes on and the gauge on the boiler slowly creeps up to 3 bar when the pressure relief valve opens and water is discharged to outside. The thermostat on the boiler seems to be working ok and shuts off the gas at 55c.
Any idea why this is happening?
Regards.
DAB.
Reply to
bramfield

Site Timeline Threads

  • Hi All I've been informed the diverter valve on my boiler has 'gone'! Could...
  • next in

    Plumbing

  • Hi All Could anyone tell me if a combi boiler can be installed in the same...
  • previous in

    Plumbing

HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.