First, narrow it down
Identify the pump that is cycling and which carton it serves. Does it stop if nobody pours that flavor, or does it keep clicking?
What you're seeing
| Symptom | Possible cause | What to do next |
|---|---|---|
| Clicks only during pours | Often normal operation | Compare with a neighboring syrup pump. |
| Runs constantly; box empty | Pump drawing air | Change the carton and reseat fitting. |
| Runs constantly; box full | Inlet leak, blocked supply, or pump fault | Check visible fittings; schedule repair. |
What to check
Check for an exhausted syrup bag
The most common cause is an empty bag. The cardboard carton may still look normal. Lift the flap, check the bag, and change the syrup when empty.
Reseat the right connector
A loose bag fitting can pull air into the product inlet. Detach and reconnect the coupling using its release mechanism; wipe up syrup and look for a cracked fitting or damaged O-ring.
Inspect the syrup path
Look for a pinched inlet, syrup puddle under the rack, a split hose, or a bad tube connection. Syrup coming out around a fitting can also mean air gets in when the pump draws.
Listen for the difference between constant running and normal use
If the clicking stops when the system sits idle but runs when employees pour drinks, that can be normal. Continuous rapid cycling with the gun untouched is the symptom to report.
Prevent needless gas use
A pump that will not stop can waste CO₂. Carbonator’s original sheet suggests disconnecting its gas line after the basic checks. Gas-line disconnection should be performed only by staff trained on that exact quick-connect system; otherwise use a clearly labeled, approved pump isolation valve or call for service.
Note whether the pump still delivers syrup
Running with no flow points toward an empty bag, suction leak, or pump fault. Running with syrup flow but failing to stop can indicate a pump check-valve or automatic shutoff problem.
Why it happens
Gas-driven Flojet-style pumps use automatic shutoff and check valves. A faulty inlet connection or shutoff can leave a pump cycling when the bag is empty.
Need service?
If changing the box and reseating the fitting do not stop constant cycling, isolate the affected pump only using your approved procedure and request service.
Contact us (215) 726-8000