Rheem
Short Cycling Due to Control or Interlock Issues
Pump starts and stops repeatedly in short cycles without user input.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose low‑voltage control wiring to Rheem pump, Faulty pressure or flow switch opening intermittently, Overly sensitive thermal overload, Automation system sending conflicting commands
How to Fix / Troubleshooting
Safety First: Turn OFF power before accessing wiring or sensors.
- Check external controls: Temporarily disconnect external automation or timers and run the pump in standalone mode. If cycling stops, reconfigure or repair the external controller.
- Inspect interlock switches: Test flow and pressure switches for stable continuity. Replace any that chatter or open intermittently.
- Verify power supply stability: Ensure the breaker and wiring are not loose, causing momentary power loss.
- Observe for overheating: If the motor is very hot when it stops, the thermal overload may be tripping due to overheating; address ventilation and load issues.
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Repair Difficulty
Medium
3/5
Required Part
Rheem Flow Switch
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