Re: Is my GTV running cold?
Give away to a stuffed stat is initial warm up. In warm weather, the temperature should be up to normal in about 2 or 3 minutes of driving. If it takes ages, then the stat is stuck either partially or fully open.
Also, I know it seems tedious, but the temp gauge should rise steadily from cold, then get to a point on the dial where the stat opens, and then rapidly drop back 20 or do degrees before climbing again to a steady temperature and then staying there.
That is the behaviour of a good thermostat. If it doesn't do that then replace it. It is a simple job and should take no more than an hour on your drive. You'll need a stat a range of jubilee clips and some sockets and some coolant. I'd also advise replacing the temperature sender unit, as they tend to corrode into the stat housing and crack or warp as you spanner them out!