A6 1.8T Brake fluid warning light

[Cambrai]

Hi, My 1.8T has recently been serviced and had its o.s.f flexi brake hose replaced. Two weeks after the replacement the Low Brake Fluid light has come on and flashed for three times on different occasions :confused: . It doesn't happen on every journey and on inspecting the level of the brake fluid it is ok. Should I take it back for a check of the hose?

Thanks Steve