Have a combi boiler which worked fine with about 1.5 bar of water pressure. Some how the water pressure has been lost and now reads 0 bar. How do I increase the water pressure.
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Underneath the boiler is a little tap turn it slowly till the gauge reads the correct pressure
theres a valve underneath which you turn,you can see the pressure rise,but dont go above 2 bar
depends on type u have.
mine has 2 taps/levers on pipes just below.
i have to open both till pressure builds up then close them!!!
You should have a plastic key which when inserted into location under boiler turn anti clockwise 90degrees then open valve next to it until gauge reads 1. 0 and shut off. REMOVE KEY.Loss of pressure is normal.Read manual
under the boiler should be an open space look up into it and you should see two little taps like the ones that connect your washer to the pipes, open them both at the same time and It will repressurize you heating system. They should be coloured blue.
Normally, you will find a little tap valve under the boiler, this comes from the mains cold water. There may be some kind of braided flexi hose attached to this, for filling the heating system. Turn this tap valve gently till the pressure rises back to 1 1/2 bar.
If the pressure has dropped, there may be a problem(leak) with the heating system, or the boiler itself.
Keep a close eye on it.