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Mend Saunier Duval ISOTWIN/THEMA Home Heating Systems

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Sabre 29 water pressure drop?

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Mend Saunier Duval ISOTWIN/THEMA Boiler Fault Code

what is an F4 fault on my Saunier Duval boiler?

My Saanier Duval has a persistant F4 fault occuring and clears when I swith of the power for 20 seconds

Michael humphries
March 2008
Saunier DuvalSaunier Duval ISOTWIN/THEMAHeating, Home Heating SystemsBoiler Saunier Duval Fault Code
Code 04 is Ignition -flame detection fault.
This applies to an Isomax F28 E2.
You would really have to give more info for a definitive answer though, as I gave this as an example, with a less than likely chance that this is the appliance you are asking about!

Martin
March 2008

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