Quote:
Originally Posted by Bigfoot
The PSU seems fine at 12.8 V on my system
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Could be the problem right there.
Have found anything above 13.2-13.3V (measured) and the pump won't start (although if the voltage is increased while the pump is already running then it's fine).
Your 12.8V (assuming you're reading that from BIOS/software) could easily translate to over 13.3V measured (or you could have a pump whose tolerance for start-up voltage is tighter than mine).