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Atlantic
Water Heater
Data independently verified by Elite B2B Technicians
Diagnostic Complet

Error Code Er 11 Atlantic

Symptom / Description

Water is dangerously hot, system locked out

Root Cause

Overheating detected by the safety thermostat, likely due to a faulty main thermostat.

Repair Instructions

UNLOCKED

Reset the safety cut-out. If the problem reoccurs, the main thermostat needs replacement.

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