24 X 7 online support 
Contact Us Free
Why Does My Wastewater Pump Run Continuously? 5 Solutions That Work
A wastewater pump that runs nonstop indicates a system malfunction requiring immediate attention. According to the EPA, continuous pump operation increases energy consumption by 300-500% and accelerates motor failure. This troubleshooting guide provides diagnostic criteria and ordered solutions from most common to rare causes.
You’re Experiencing This Problem If…
Your sewage pump exhibits continuous pump operation when it shows these symptoms: the pump motor runs 24/7 without shutting off, you hear constant pump noise from the sump basin or pump pit, your utility bills increase unexpectedly due to excessive energy consumption, or the pump cycles on and off rapidly (short cycling) every few minutes. Unlike normal pump cycling that occurs 2-4 times daily in residential wastewater systems, a pump that won’t shut off operates constantly regardless of actual water level in the sewage basin.
Immediate risks include pump burnout from motor overheating, bearing damage, seal failure, and complete system failure within 48-72 hours of continuous operation. Commercial wastewater systems face additional risks of sewage backup affecting multiple units or facilities.
Quick Solution: Check Your Float Switch First
The float switch accounts for 60-70% of wastewater pump malfunction cases involving continuous running, according to pump manufacturers. This water level sensor controls automatic shutoff when water reaches the low water shutoff point.
Immediate diagnostic steps: Turn off power supply at the circuit breaker, visually inspect the float arm stuck in the “up” position, check for debris accumulation around the float, and manually move the float up and down to test movement. A stuck float switch prevents the pump control panel from receiving the shutoff signal, causing the sewage pump won’t stop running condition.
If the float moves freely, reconnect power and observe one pump cycle. The float should rise with increasing water level, trigger pump activation, then fall as water drains, signaling automatic pump shutoff at the designated low water level.