Forum Discussion
Biggyniner
Jul 20, 2015Explorer
Stefonius wrote:
Congrats on your new (to you) RV!
The temperature of your coolant does fluctuate with load, ambient temperature and amount of air traveling through the radiator. This should cause the needle to swing up and down throughout the "normal" range of the temp gauge.
Unfortunately, some owners thought this was indicative of a problem, and would take their vehicles in to the dealership over and over when there wasn't anything wrong with the engine or cooling system.
Ford finally put a stop to this by adding a resistor in line with the gauge. Modern Ford temp gauges remain centered in the "normal" range at all times except when the engine is stone cold or dangerously overheated.
If you have a vehicle without a "dumb" gauge, consider yourself fortunate.
This is good info, thanks!
About Motorhome Group
38,763 PostsLatest Activity: Dec 05, 2025