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Boiler not working?

I came home to find my ferroli he boiler flashing F37. The guage was just below 1. I followed the instructions to try to refill the boiler. Didn't hear any water and guage didn't rise. Now the boiler is flashing f40. Any ideas? Thanks.

Jo
November 2017
FerroliFerroli HEHeating, Home Heating SystemsBoiler Heating Pressure

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