temp guage

[robertson]

Hi can some body help my temp guage has started to go from 90 back to 60 and back up to 90 all the time when driving any idea

Please. 

[Steve Q]

This could be caused by a failing thermostat 

[cliffcoggin]

It could also be a faulty temperature sender.

[robertson]

Thanks will try booth and see

[Magnet]

Thanks David,

I would replace only one of the two mentioned parts at one time, and test, otherwise you won’t know which one was the culprit. Think sender is the easiest of the two, so I would be trying that first. 
Let us know how you get on David. 
Kind regards,

Gareth.