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Jason RamirezAug 9, 2025
What to do if A.O. Smith GDHE-75 has no hot water?
- PPeter NelsonAug 9, 2025
If you're not getting enough hot water from your A.O. Smith Water Heater, start by checking the breaker, fuses, and the water heating Enable/Disable switch to ensure the unit is receiving power. Also, make sure the hot water supply valves to your fixtures are open. If the issue persists, the operating set point might be too low, or the differential setting may be too high, requiring adjustment. Check for any hot water piping leaks, open faucets, or a leaking drain valve. Another reason could be sediment or lime scale accumulation affecting the water heater's operation, in that case, flush the water heater.
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