As title says, my fridge is no longer cooling my cans of pop, the light still lights up blue, so what can I check?

#firstwordproblems 07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))