10-15 min · 9 steps
Glycol Pump: Running but No / Low Flow
The glycol circulator runs but the loop isn't getting flow — valves, air, rotation, or a worn pump.
First step
With the pump running, is developed head low (suction & discharge pressures close together)?
Yes — little/no head
No — head normal but flow still low
This is a preview of the first step. Run the full interactive diagnostic free — it walks you all the way to the likely root cause.