Changed both of the water temperature sensors. temperature light still jumps up to the red. seems to happen when the car is starting to cool down a little it goes from three lights to two and a few seconds later jumps up into the red with fan on full. engine is not hot.
Problem added: Jun 1, 2022 (1 year ago)
If that year / model is a diesel , sounds as if DPF is regenerating . If so and used for short journeys , advisable to give a good , fast run for a while to complete process