Erratic temp gauge

[Devon Z]

Been out today for a run today and noticed the temp gauge wasn’t in its usual mid position but cooler almost to the quarter, as I got into traffic it went back to mid position. Did this for the rest of the day, is this a sign my thermostat is on the way out?

She’s due a coolant change over winter so I think I’ll do belts, water pump and thermostat.

 

[Brian H]

Yes, thermostat is either fully open or sticking open, change sooner rather than later if you can, the car may tend to run a little rich unit changed.

 

[Devon Z]

She’s off the road from the end of the month so I’ll add it to winter maintenance program.

 

[ktnez99]

Been out today for a run today and noticed the temp gauge wasn’t in its usual mid position but cooler almost to the quarter, as I got into traffic it went back to mid position. Did this for the rest of the day, is this a sign my thermostat is on the way out?

She’s due a coolant change over winter so I think I’ll do belts, water pump and thermostat.

Sounds like the thermostat to me. Mine went: stuck open. Heat inside the car was non-existent and hard on fuel. I’d prioritise a new one ASAP.