Boiler fault and error code information for the Vaillant Ecomax PRO 18.28E
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Are you experiencing a fault code with your Ecomax PRO 18.28E boiler? Below you’ll find information on the fault codes for your boiler and the possible reasons for the fault you are experiencing.
Fault codes for the Ecomax PRO 18.28E boiler
F1 No gas, ignition fault, gas valve adjustment, electrode lead defective, Possible flue fault
F4 Ignition fault when lit, check as above
F5 Overheat fault, overheat stat oprtated
F6 Flow NTC fault
F16 Gas valve fault
F17 Check polarity
F24 System fault, possible failed pump, pump over-run, or air lock
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