Side by side LG GR-L207DXZA. Just at the wrong time of year the fridge plays up..... Can you

Question

Just at the wrong time of year the fridge plays up..... Can you help? Although ooling/freezing seem fine I have an error code displayed 'CF'. The error code disappears for a minute or so if you switch the fridge off at the wall and then switch it back on again. Temperature displayed for that minute show normal. Also, the vertical part of the internal case of the fridge where the upright of the doors close onto seems very warm. Thank you.