Takagi water heater installed outdoors will not operate in cold weather; may show no code or intermittent operation.

Safety first: Do not attempt to operate the heater if you suspect it is frozen; internal damage can worsen. Turn OFF power and gas if leaks are present.

Steps:

• 1. Verify power: Freeze protection heaters require electrical power. Ensure the breaker is ON and the unit has power during freezing conditions.
• 2. Inspect for leaks: Once temperatures rise, check for water leaks indicating freeze damage to the heat exchanger or piping.
• 3. Insulate piping: Add insulation and heat tape (if appropriate) to exposed hot and cold lines near the outdoor unit.
• 4. Professional inspection: If the unit was frozen, have a technician inspect for cracked heat exchanger or internal components and replace as needed.