A. O. Smith · Voltex MAX / Signature 900 Premium (HPTA, HPA10)
A. O. Smith Voltex MAX / Signature 900 Premium (HPTA, HPA10) error code 080
Air filter dirty
What it means
Air filter is dirty.
How it shows: with an alert icon flashing (also flashing red LED)
What A. O. Smith says to do
1. Take the tab on the air filter and remove (slide) it from the air intake duct adaptor located on the top of the unit. 2. If you are replacing the filter, skip to step three. To clean the filter, use a vacuum with a hose attachment to remove any dust or debris. 3. Place the new or cleaned filter into the water heater.
The manual adds: "These instructions are brief and intended as guidance for a qualified person. If you lack the necessary skills to perform these procedures call the Technical Assistance Hotline which is listed on the water heater's warranty sheet for assistance." (Hybrid Electric Heat Pump Water Heater Installation Instructions and Use & Care Guide (Premium/Smart Valve), 100379654_2000812401, page 27)
Last checked 2026-10-03.
Safety first
- WARNING! Working near an energized circuit can result in severe injury or death from electrical shock. (p.28)
- WARNING! When you are finished, be sure all covers are secured to reduce the risk of fire and electric shock. (p.28)
From the manufacturer's manual for this series.
The same code on other models
Codes mean different things on different heaters. Match the series to the model number on your rating label.
- A. O. Smith Voltex AL Smart / Signature 900 Standard (HPTS, HPS10): 080
- A. O. Smith Voltex 120V plug-in (HPTV, HPV10): 080
Other Voltex MAX / Signature 900 Premium (HPTA, HPA10) codes
- 001 (Dry-fire)
- 003 (Upper thermistor sensor failure)
- 004 (Lower thermistor sensor failure)
- 006 (Internal Processor Error)
- 009 (Power supply voltage too low)
- 021 (Upper element circuit failure)
- 022 (Lower element circuit failure)
- 025 (Heat pump coil temperature sensor)
- 026 (Heat pump suction temperature sensor)
- 027 (Heat pump discharge temperature sensor)
- 028 (Ambient temperature sensor failure)
- 029 (Outlet temperature sensor failure)
- 031 (Water leak)
- 044 (SAC anode depleted)
- 046 (Shut-off valve)
- 047 (Smart Valve failure)
- 048 (Battery low energy)
- 081 (Condensate management)
- 083 (Compressor suction pressure too low)
- 084 (Compressor not functioning)
- 085 (Compressor discharge temperature too high)
- 086 (Fan speed feedback)
- HPO (Heat pump out of operating range)
- ICE (Heat pump defrost)
- CLR (Error code cleared)