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Trane Error Code 1st digit 5: Limp mode (A1000AA) (AC)

Updated · by Aurora Star Tech Inc.

Trane error code 1st digit 5 on a air conditioner means: Limp mode (A1000AA). It is also called Trane diagnostic code 1st digit 5.

Low severityAir ConditionerAlso Heat PumpTrane 5TTR7

Homeowner? What Trane code 1st digit 5 means for you

Usually minor Your air conditioner is reporting: Limp mode (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.
  • Keep about 2 feet around the outdoor unit clear of leaves, grass and debris.
  • If you see ice on the pipes or the indoor coil, turn the system off and run only the fan for a few hours, then call a technician.
  • 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 5 mean?

First digit 5 = limp mode. 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)

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Trane models that use code 1st digit 5

5TTR7024A5TTR7036A5TTR7048A5TTR7060A

Other Trane AC codes

CodeMeaning
00Standby (A1000BA)
1st digit 0Standby (A1000AA)
1st digit 1Starting (A1000AA)
1st digit 2Low speed (A1000AA)
1st digit 3High speed (A1000AA)
1st digit 4Boost speed (A1000AA)
1st digit 6Preheating (A1000AA)
1st digit 8De-rate (A1000AA)
1st digit 9Oil return (A1000AA)
2nd digit 1MOC fault (A1000AA board)
2nd digit 2MOC communication fault (A1000AA board)
2nd digit 3Compressor internal protection (IOL/OLP) (A1000AA board)

All Trane Air Conditioner error codes →

Trane code 1st digit 5: homeowner questions

What does Trane code 1st digit 5 mean?

Limp mode (A1000AA). First digit 5 = limp mode. 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 air conditioner with code 1st digit 5?

Usually yes. Code 1st digit 5 is normally minor, but if it keeps coming back have it checked.

Can I reset Trane code 1st digit 5 myself?

You can try one reset (power off for 30 seconds, then on). If Trane code 1st digit 5 comes back, the cause is still there and a licensed technician should check it.

Who can fix Trane code 1st digit 5 near me?

Aurora Star Tech Inc. repairs Trane air conditioners 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

Troubleshooting guides

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.

Emergency HVAC Service

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