A.O. Smith APW015DW - User Manual

Questions and Answers

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Mary LeeSep 1, 2025
Why is my A.O. Smith Water Heater heat pump not running - electrical issues?
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  Edgar MorrisSep 1, 2025
  If your A.O. Smith Water Heater's heat pump isn't running and you suspect electrical issues, first check if the circuit has adequate ampacity by referring to the unit's nameplate. Inspect the field wiring for short circuits or loose connections, consulting the field wiring diagram. Also, check the unit's electrical cabinet for short circuits or loose connections, tightening all connections as needed. If the thermostat has failed, replace it. If the Phase Monitor fault light is on, reset the phase monitor.
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Ryan KingAug 31, 2025
Why is my A.O. Smith Water Heater water not hot enough?
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  kristina77Aug 31, 2025
  If your A.O. Smith Water Heater is not providing hot enough water, make sure the thermostat isn't set too low and adjust it to a higher temperature. The heat pump or storage tank might be undersized for your needs, in which case you could increase the size of the storage tank or install a gas or electric heater to compensate. Also, ensure the heat pump is properly connected to the storage tank by referring to the field piping diagrams. Finally, if the unit's cooling coil is overcooling the space, consider using backup water heating, ducting cool air to another space, or ducting warmer air from another space to the installed room.
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Sara HoltAug 30, 2025
Why is my A.O. Smith Water Heater heat pump not running - high pressure fault?
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  Kristen MarshallAug 30, 2025
  If your A.O. Smith Water Heater's heat pump isn't running due to a high pressure fault, first ensure the thermostat setting does not exceed 140°F. If the room temperature is over 95°F, keep the heat pump off until the temperature is within the operating range. Also, check for low water flow; this could be due to the unit pump not operating, excessive piping length between the heat pump and storage tank, scale buildup in the heat exchanger, or partially closed shut-off valves. Possible solutions include replacing the unit pump, reducing piping length or adding a booster pump, cleaning the heat exchanger with a mild acid wash, or fully opening all shut-off valves.
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peter12Aug 29, 2025
Why is my A.O. Smith APW015DW water too hot?
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  Eric DaviesAug 29, 2025
  If the water from your A.O. Smith water heater is too hot, the thermostat might be set too high. Refer to the TEMPERATURE REGULATION section for instructions on adjusting it.
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Caroline ToddAug 28, 2025
Why won't the pilot light on my A.O. Smith Water Heater light?
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  Willie HarringtonAug 28, 2025
  If the pilot on your A.O. Smith water heater won't light, ensure the gas control knob is correctly positioned (refer to LIGHTING INSTRUCTIONS). Also, check that the main gas supply is on and turn on the main gas shutoff valve if necessary. Finally, a thermocouple malfunction could be the cause, requiring replacement of the pilot assembly and/or thermocouple.
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tturnerAug 27, 2025
Why is my A.O. Smith APW015DW Water Heater's T&P valve leaking?
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  danielle75Aug 27, 2025
  A leaking T&P valve in your A.O. Smith water heater can occur due to thermal expansion in a closed water system. Install a thermal expansion tank to resolve this issue and DO NOT plug the T&P valve. It can also happen due to an improperly seated valve. Check the relief valve for proper operation, and again, DO NOT plug the T&P valve.
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David RamosAug 26, 2025
What to do if A.O. Smith APW015DW burner will not stay lit?
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  Stephen JacksonAug 27, 2025
  If the burner in your A.O. Smith water heater won't stay lit, it could be due to a thermocouple malfunction. Consider replacing the pilot assembly and/or thermocouple. Another potential cause is a defective gas control, which would require replacing the gas control.
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Meghan GriffithAug 25, 2025
Why does my A.O. Smith Water Heater pilot keep going out?
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  Ashley JamesAug 26, 2025
  A pilot outage in your A.O. Smith water heater may be due to several reasons. The pilot burner might be dirty, so clean the pilot assembly. A thermocouple malfunction is another possibility, requiring replacement of the pilot assembly and/or thermocouple. A defective gas control could also be the cause, necessitating replacement of the gas control. Additionally, ensure the thermocouple tip is correctly positioned in contact with the pilot flame; if not, insert the thermocouple correctly.
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Melanie PerezAug 25, 2025
Why is my A.O. Smith APW015DW Water Heater not producing enough hot water?
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  donlewisAug 25, 2025
  Several factors can cause an A.O. Smith water heater to not produce enough hot water. The heater might not be lit, or the thermostat isn't on. In this case, refer to the LIGHTING INSTRUCTIONS. The thermostat might be set too low (refer to TEMPERATURE REGULATION). The heater could be undersized, so reduce hot water use. Low gas pressure can also be a factor, so contact your gas supplier. If the incoming water is unusually cold, allow more time for the heater to reheat. Leaking hot water pipes or fixtures should be checked and repaired by a plumber. Finally, a high-temperature limit switch may have been activated, in which case you should contact a service technician.