A.O. Smith APW015DW - User Manual

Questions and Answers

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Robert HarveySep 12, 2025
What causes a low-pressure fault in an A.O. Smith Heat Pump, preventing it from running?
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  Robert KeithSep 12, 2025
  If your A.O. Smith Heat Pump is not running due to a low-pressure fault, check the following: * If the room temperature is below 40°F, keep the heat pump off until the room temperature is back in the operating range. * Correct the airflow issue if the blower is not operating at nameplate CFM, the blower belt is broken or out of alignment, or the filters are dirty. * Correct the airflow issue if the unit does not have adequate clearances obstructing airflow. * Find the source of the leak, repair it, and recharge the system if there is a loss of refrigerant.
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Jessica RussellSep 12, 2025
How do I troubleshoot a high-pressure fault causing my A.O. Smith Heat Pump not to run?
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  Ariana VillaSep 12, 2025
  If your A.O. Smith Heat Pump is not running due to a high-pressure fault, consider these potential causes: * Ensure the thermostat setting does not exceed 160°F. * If the air temperature is over 95°F, keep the heat pump off until the room temperature is back in the operating range. * Address low water flow issues. * Replace the unit pump if the external pump is not operating. * Reduce piping or add a booster pump if the piping between the heat pump and storage tank exceeds 50 equivalent feet. * Clean the heat exchanger with a mild acid wash if there is scale buildup. * Open all shut-off valves if they are partially closed.
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markjohnsonSep 9, 2025
Why is there water on the floor around my A.O. Smith Heat Pump?
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  ccookeSep 10, 2025
  If you find water on the floor around your A.O. Smith Heat Pump or water tank, here are several possible causes and solutions: * If tubing, valves, or fittings are leaking, repair them as necessary. * If the heat pump is not level, causing the drain pan to overflow, shim the unit to level it. * Ensure the condensate trap depth maintains a water column during operation if the condensate trap is not installed properly. * If the drain pan is overflowing, remove any obstruction using a pipe snake or compressed air. * If condensation is forming on the bottom of the unit (in humid environments), cover the bottom of the unit with foam insulation.
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Debra CunninghamSep 8, 2025
What to do if my A.O. Smith Heat Pump is not running due to electrical issues?
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  Kelli ClarkSep 8, 2025
  If your A.O. Smith Heat Pump is not running due to electrical issues, consider the following: * Check the unit nameplate for circuit requirements if the circuit does not have adequate ampacity. * Inspect the field wiring diagram for short circuits or loose connections in field wiring and tighten all connections. * Check inside the cabinet for loose wiring and tighten. * Replace the thermostat if it has failed. * Reset the phase monitor if there is a defective anti-short cycle timer. * Replace the compressor if there is a compressor burn-out.
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Karen AdamsSep 7, 2025
How to fix a noisy A.O. Smith Heat Pump?
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  Charles SmithSep 7, 2025
  A noisy A.O. Smith Heat Pump can often be resolved by addressing the following potential causes: * If sheet metal fasteners are loose, tighten them. * If the operating vibration is transferring to the floor or building structure, place vibration dampers underneath the unit. * If the blower pulley assembly is loose or out of alignment, tighten or align the pulleys.
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Melissa JacksonAug 23, 2025
Why is my A.O. Smith APW015DW Water Heater leaking?
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  Shelly MirandaAug 23, 2025
  Water leaks in your A.O. Smith water heater can stem from several causes. One potential reason is improperly sealed connections at the hot or cold supply, relief valve, drain valve, or thermostat threads. Try tightening these threaded connections to resolve the issue. Also, inspect nearby appliances and water lines for leaks that may appear to be coming from the water heater. Condensation may be another cause. In this case, refer to the CONDENSATION section.
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Carrie SheppardSep 5, 2025
What causes sooting in an A.O. Smith APW015DW?
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  Amanda GrahamSep 5, 2025
  Sooting in your A.O. Smith water heater is caused by improper combustion. No adjustment is available. Contact a service technician to determine the cause.
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Jason BlankenshipSep 4, 2025
Why is my A.O. Smith APW015DW Water Heater making sizzling or rumbling sounds?
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  Jason RiggsSep 4, 2025
  Sizzling or rumbling sounds in your A.O. Smith water heater are often caused by sediment or calcium buildup in the bottom of the tank. To resolve this, clean the sediment from the tank. Refer to the Draining instructions in the Maintenance section of the manual.
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Bryan PerezSep 3, 2025
Why does my A.O. Smith Water Heater smell bad?
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  Lisa CochranSep 4, 2025
  Smelly water in your A.O. Smith water heater can be attributed to a high sulfate or mineral content in the water supply. To address this, drain and flush the heater thoroughly, then refill it. Another cause might be bacteria in the water supply, in which case you should chlorinate or aerate the water supply.
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Joseph HendersonSep 2, 2025
Why is my A.O. Smith APW015DW Water Heater heat pump not running - low pressure fault?
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  Christian WilliamsSep 2, 2025
  If your A.O. Smith Water Heater heat pump is not running due to a low pressure fault, it could be because the room temperature is below 50°F; in that case, keep the heat pump off until the room temperature is back in operating range. Another cause could be the blower not operating at the specified CFM due to a broken or misaligned blower belt, or dirty filters; correct the airflow issue. Inadequate clearances obstructing airflow around the unit can also cause this issue. Finally, a loss of refrigerant could be the culprit; find the source of the leak, repair it, and recharge the system.