ZG-14 handles PHX temps just fine!
Even when plunking around like Steve...
Up to the rider to be prepared, as always.
To the OP
Situation normal, everything is fine, just a blaster malfunction....
*always wanted to use that*
My "gauge" behaves, like yours, in FL just the same as it did in AZ!
If you start to smell a hint of that sweet coolant smell it usually means it's time to pull the Tupperware and tighten/check the hose clamps. They can become loose enough to cause a leak that does not result in a drip.
With the plastics off is a great time to do other maintenance/farkle work!