E20
Sta-Rite
Sensor Calibration / Out-of-Range Fault
Heater shows E20; may be accompanied by erratic temperature readings
Advertisements
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.
Advertisements
Possible Causes
Mismatched replacement sensors, Incorrect sensor wiring, Damaged sensor harness
How to Fix / Troubleshooting
Safety: Turn off power before working on sensor wiring.
- Verify sensor part numbers: Ensure that any replaced Sta-Rite thermistors (water, inlet, outlet) are OEM and correct for the model.
- Inspect harness: Trace the sensor harness from the manifold to the control board, checking for splices, damage, or incorrect connections.
- Measure resistance: Compare sensor resistance at known water temperature to Sta-Rite charts. Replace any sensor that is significantly off.
- Reset control: After correcting sensors, power cycle the heater to clear the fault.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Sensor Harness
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements