Fixing DDC Pump Noise in Distro Plates
Updated October 21, 2026A humming noise from a distro plate DDC pump is usually caused by trapped air pockets inside the housing. This noise typically resolves within 72 to 96 hours, but you can speed up the process by tilting your case and cycling power.
A humming sound coming from a DDC pump on your distribution plate is almost always the result of trapped air inside the pump chamber. DDC pumps are known to hold on to small air pockets, particularly when integrated into distro plates, and these trapped bubbles create vibrational resonance while the impeller spins. In most systems, this air will naturally work its way out into the reservoir section within 72 to 96 hours of continuous runtime.
You can actively speed up this bleeding process with a few straightforward adjustments. While the loop is operating, gently tilt and rock your chassis from side to side to help dislodge air pockets from the pump cavity and guide them toward the reservoir. Additionally, cycle your power by shutting down the system for a few seconds and turning it back on; each restart delivers a brief surge that helps push trapped air out into the main loop. Be sure to top off your coolant as the air escapes and the fluid level drops.
Once the air pockets are fully cleared, your pump should settle into quiet, normal operation. If the humming persists after several days or turns into a harsh grinding sound, reach out to PrimoChill support at support@primochill.com so our team can help you troubleshoot further.