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ferroli domicondens f24 not working?

i have a ferroli domicondens f24 boiler its flashing up f37 any ideas on how to fix this please

sue
February 2013
FerroliHeating, Home Heating SystemsWorking Boiler Flashing
u need to add water as the pressure is to low. underneath the boiler u will see a gauge the pressure needs to be between 1 and 1.5. open the black valves underneath the boiler to increase the presure and close them once its up to pressure

kash
February 2013

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