A.O. Smith fault code Insufficient / no hot water
Fault code Insufficient / no hot water on an A.O. Smith water heater (including Innovo) means: The boiler has been switched off. 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 Insufficient / no hot water on an A.O. Smith water heater indicates: The boiler has been switched off.
Fixing fault code Insufficient / no hot water: step by step
- Note the exact code and the type of your appliance (see the rating plate).
- Check that the appliance has power and that its circuit breaker is on.
- Reset the appliance once. If the code comes straight back, do not keep resetting it.
- If the code comes back, choose the matching part below or have a qualified heating engineer take a look.
Applies to
A.O. Smith Innovo, IR 12-160, IR 12-200, IR 20-160, IR 20-200, IR 24-245, IR 24-285, IR 32-245, IR 32-285, BFC, 100, 120, 28, 30, 50, 60, 80.
Fault code Insufficient / no hot water 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:
- Insufficient / no hot water on Innovo, IR 12-160, IR 12-200, IR 20-160, IR 20-200, IR 24-245: There is no supply voltage.
- Insufficient / no hot water on Innovo, IR 12-160, IR 12-200, IR 20-160, IR 20-200, IR 24-245: There is no hot water left.
- Insufficient / no hot water on BFC, Innovo, 100, 120, 28, 30: The control is in OFF mode.
- Insufficient / no hot water on BFC, Innovo, 100, 120, 28, 30: The temperature (Tset) is set too low.
- Insufficient / no hot water on ADMR, 115, 135, 60, 80, 90: The control is in the OFF position.
- Insufficient / no hot water on ADMR, 115, 135, 60, 80, 90: Temperature (Tset) is set too low.
- Insufficient / no hot water on ADMR, 115, 135, 40, 50, 60: Appliance is switched off.
- Insufficient / no hot water on ADMR, 115, 135, 40, 50, 60: No supply voltage present.
- Insufficient / no hot water on ADMR, 115, 135, 40, 50, 60: Hot water supply is exhausted.
Matching parts
A.O. Smith parts are available from Instalpunt; shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days.
This message does not point directly to one faulty part. These are the parts that most often fit this appliance:
- A.O. Smith ionisation pin after September 2009 € 43.49
- A.O. Smith glow plug for e.g. Innovo IR32-380L 0311990(S) € 96.49
- A.O. Smith fan adapter € 101.93
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 Insufficient / no hot water mean?
The boiler has been switched off.
How do I fix fault code Insufficient / no hot water 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 Insufficient / no hot water?
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 Insufficient / no hot water 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 →