Trane Error Code 1st digit 1: Starting (A1000AA) (Heat Pump)
Trane error code 1st digit 1 on a heat pump means: Starting (A1000AA). It is also called Trane diagnostic code 1st digit 1.
Homeowner? What Trane code 1st digit 1 means for you
Usually minor Your heat pump is reporting: Starting (A1000AA). This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Trane error code 1st digit 1 mean?
First digit 1 = compressor starting. On the A1000AA drive two 7-segment digits are shown: the first digit is the status and the second the fault. If several faults exist the display cycles through them.
Applies to: 5TTR7 A-C / 5TWR7 heat pump multi-speed outdoor drive (AOC)
Trane models that use code 1st digit 1
5TWR7024A5TWR7036A5TWR7048A5TWR7060A
Other Trane Heat Pump codes
All Trane Heat Pump error codes →
Trane code 1st digit 1: homeowner questions
What does Trane code 1st digit 1 mean?
Starting (A1000AA). First digit 1 = compressor starting. On the A1000AA drive two 7-segment digits are shown: the first digit is the status and the second the fault. If several faults exist the display cycles through them.
Is it safe to keep using my heat pump with code 1st digit 1?
Usually yes. Code 1st digit 1 is normally minor, but if it keeps coming back have it checked.
Can I reset Trane code 1st digit 1 myself?
You can try one reset (power off for 30 seconds, then on). If Trane code 1st digit 1 comes back, the cause is still there and a licensed technician should check it.
Who can fix Trane code 1st digit 1 near me?
Aurora Star Tech Inc. repairs Trane heat pumps in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air
Troubleshooting guides
- Force a defrost cycle with the button Trane · Heat Pump
- Forcing a defrost - Trane 5TWR7 Trane · Heat Pump
Source: Trane 5TTR7/5TWR7 installation ODR-SVN002E-EN, Table 17 A1000AA status/fault list, p.24-25. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.