Detecting a state of icing in a turbomachine fuel circuit includes reading information representative of a first temperature T1 of the fuel downstream from the metering unit, and of comparing the first temperature T1 with a first reference temperature T01. The method also includes detecting clogging of the filter unit. In the event of the temperature reading T1 being less than the first reference temperature T01 and of clogging being detected, a signal indicative of an icing state in the fuel circuit is issued. Information representative of a second fuel temperature T2 in the tank may be read and compared with a reference temperature T02 in order to confirm or contradict the icing state. A signal indicating a need for maintenance of the fuel circuit is issued when the temperature readings T1 and T2 are not less than the reference temperatures T01 and T02 and clogging has been detected.