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Mend Oneline Heatline condensing boiler Code Showing Runs

how to fix f7 onheatline condesing boiler ?

i have a customer with a f7 code showing the fan runs at high speed no matter if the boiler controls are off can you tell me what part is at fault the fault reads no fan signal

steve carter
January 2011
OnelineOneline Heatline condensing boilerHeating, Home Heating SystemsCode Showing Runs
to fix the f7 code just simply replace the fan

STEVE CARTER
January 2011

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Heatline Boiler F7 Error - Fix & Guide