We have had an RV500 in our Caravel
for over ten years. It usually works just fine. However, every once in a while it will act up. I have found that if I disconnect it from the 12V
power and re-connect, it will "re-boot" the processor and work just fine. It has been blamed by Precision Temp on "noisy" 110V coming into the trailer.
Yes, too slow a flow will make it shut off.