When I am cruising on the highway in cold weather (morning) in northern areas (as I belong to Abbottabad) my temp drops a little down from the middle to say 1/3. Once in really heavy rain (kinda storm) I was going around 20 Km/h it dropped almost all the way (just above C) but as soon as I gained speed it got back to normal (center).
It drops just a little bit if I have AC on at night time when it is cool outside. It makes the radiator fan run almost continuously which causes the temp drop a bit.
It never drops when traveling in Punjab or Islamabad in summer.
I think the thermostat is stuck a little bit open. I am stating a little bit because during cold starts car warms up fairly quickly (2-5 mins).
Do I have a faulty thermostat or its normal for swift?
I am afraid to play with the thermostat as so many guys reporting heating issues.