A.O. Smith fault code 031 - 038
Fault code 031 - 038 on an A.O. Smith water heater (including DRE Plus) means: Supply voltage is incorrect. Reset the appliance once. If the code comes back, a part is usually faulty. You can check the water pressure and settings yourself; leave work on gas-carrying parts to a certified gas engineer.
After a safety alert (gas, flue gas, combustion), reset no more than once and call in a certified gas engineer. If you smell gas, call your national gas emergency number or 112 immediately.
Cause
Fault code 031 - 038 on an A.O. Smith water heater indicates: Supply voltage is incorrect.
Applies to
A.O. Smith DRE Plus, 52-18, 52-36, 52-9, 80-18, 80-36, 80-54, 80-9.
Fault code 031 - 038 on other A.O. Smith series
The same code does not mean the same thing on every series. Check the rating plate to see which series you have:
- 031 - 038 on DRE Plus, 52-18, 52-36, 52-9, 80-18, 80-36: Voltage to the control panel is incorrect.
Matching parts
A.O. Smith parts are available from Instalpunt; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days.
This message does not point directly to one faulty part. If the code keeps coming back, view the A.O. Smith parts:
Fix it yourself or call an engineer?
Always consult the manual for your appliance and work safely. If in doubt or if the fault comes back, call in a qualified professional. A question about a part? Write to us at info@instalpunt.nl.
Frequently asked questions
What does A.O. Smith water heater fault code 031 - 038 mean?
Supply voltage is incorrect.
How do I fix fault code 031 - 038 on an A.O. Smith water heater?
First check the cause described above. Then restart the appliance using the reset button. If the message comes back, a part usually needs replacing or the fault needs to be repaired by a qualified professional.
Which parts do I need for A.O. Smith fault code 031 - 038?
That depends on the exact cause. In the A.O. Smith parts overview at Instalpunt you will find the current price and stock for each part.
Can I fix fault code 031 - 038 myself?
You can reset the appliance and check things like the water pressure or settings yourself. Work on gas-carrying parts must be left to a certified gas engineer.
All A.O. Smith water heater faults and codes at a glance →