While driving along my water temp reads 88 degrees on the Power FC. Stopped in traffic it goes up to 92 then the fans kick in and it drops back down to 88.

Recently the temp has been staying stuck on 91.

Is this my thermostat on its way out?

 

Have you checked water level etc?

Simon

 

oh and check the fans work....

 

level is fine and the fans work

 

Could just be now we are getting warmer weather
Mine tends to be about 89 when driving or after a short blast it will drop down to 85. Traffic it sometimes goes to 92 then fans kick in and it drops down again to mid 80's

 

I bought a ZeroSports coolthermo thermostat. It opens at a lower temp than the OEM stat. So that should sort it.