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Ideal fault code

Ideal F6: outside sensor fault

Engineer only

Ideal describes F6 on Logic Combi (ESP1) boilers as: outside sensor fault.

What you can safely do

There is nothing you can safely do yourself with this one. Leave the boiler off and book an engineer.

Find a Gas Safe engineer near you Opens the official Gas Safe Register search.

Applies to: Logic Combi (ESP1). Codes can differ between models, so check your manual.

From Ideal's own fault tables. Your model name is usually on the front of the boiler or in the user manual.

Model	Meaning
Logic Combi (ESP1)	Outside sensor fault

Can I fix Ideal F6 myself?

No. It needs a Gas Safe registered engineer to diagnose. Tell them the exact code and your boiler's model name.