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turbomax?

keep getting error f28 - the boiler is not igniting, have reset but no sucess.
distressed, March 2006
If the spark is weak, it could be the control board.

mick, April 2006
Fault code F28 is caused by either no gas/insufficient gas to boiler or a faulty gas valve on the boiler or a fault with the ignition system. If you have other gas appliances in the property and they work ok,then it is most likely the gas valve.

Scott Clapperton, April 2006