My 1999 Ford Ranger ran cool all the time, and the temp would fluctuate on dashboard. This video will show you how to change the thermostat without depressurizing your A/C system. Be careful around cooling system components and spinning fan blades!
Thermostat Kit-192 Degrees w/Seal https://www.amazon.com/dp/B0BM6LY1J3?...
https://a.co/d/475EpcN