So after replacing just about everything I am still having issues. Waterpump, thermostat, temp sender, flushed system (twice), burped etc. The only thing I have not replaced is the coolant reservoir sensor.
Car comes up to temperature (water) as I have described. Drives fine and if I am moving I do not have a problem, but as soon as I am sat still for more than a minute or two the light starts flashing and the water temp moves on to the 3rd line, but not past it. Once I am moving the light goes off again and the gauge drops to just under the 3rd line. I know this is the wrong position, but I was going to ignore if I had no other issues. Oil temp is between 82-86 under normal driving and I have not seen it go above 88.
I really don't know where to start with this now. I am debating whether to replace the temp sender. I think the garage fitted a non genuine one. So, i was going to pop into my local dealer and get a genuine one.
However, can someone more knowledgeable than me number step through what I should check for by having the car just running on my drive. What hose should be cold/warm/hot & when etc.
If anyone is in Lincoln/Newark area and is handy and is prepared to help please let me know. I can travel out to you to make it easier.