e2
Moderate
Rheem · HVAC Systems & Water Heaters
Sensor Short (Water Heater)
Quick Answer
Error code E2 on your Rheem HVAC Systems & Water Heaters means: Sensor Short (Water Heater). This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Disconnect the sensor and measure its resistance (a shorted sensor reads near zero ohms)
2
Inspect the sensor wiring for damage, pinching, or water exposure
3
Verify the correct sensor part number is installed for the specific water heater model
4
Replace the sensor if it reads zero or near-zero resistance
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Water heater thermistor sensor
Sensor wiring harness
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