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Mend Heatslave 12/14 Heating Boiler Pressure

heatslave 12/14 very low pressure, what button do i twiddle?

i've looked on the website and in the manual but i just cant match the buttons inside my boilers to their pics. is it the cold water i need to increase? whats the proper name for that? where do i find it?
i just want to increase the pressure to 1.5 at the mo it's almost zero

gillian
February 2010
HeatslaveHeatslave 12/14Heating, Home Heating SystemsHeating Boiler Pressure

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Heatslave 12/14 Low Pressure - Help!