Trane Error Code Y.2: Starting, high (A1000BA) (Heat Pump)
Trane error code Y.2 on a heat pump means: Starting, high (A1000BA). It is also called Trane diagnostic code Y.2.
Homeowner? What Trane code Y.2 means for you
Usually minor Your heat pump is reporting: Starting, high (A1000BA). 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 Y.2 mean?
Compressor is starting in high speed. Normal.
Applies to: 5TTR7 A-C / 5TWR7 heat pump multi-speed outdoor drive (AOC)
Trane models that use code Y.2
5TWR7024A5TWR7036A5TWR7048A5TWR7060A
Other Trane Heat Pump codes
All Trane Heat Pump error codes →
Trane code Y.2: homeowner questions
What does Trane code Y.2 mean?
Starting, high (A1000BA). Compressor is starting in high speed. Normal.
Is it safe to keep using my heat pump with code Y.2?
Usually yes. Code Y.2 is normally minor, but if it keeps coming back have it checked.
Can I reset Trane code Y.2 myself?
You can try one reset (power off for 30 seconds, then on). If Trane code Y.2 comes back, the cause is still there and a licensed technician should check it.
Who can fix Trane code Y.2 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
- 2 flashes: HPS open ≥6 s; 3: discharge >263°F; 4: discharge <90°F after 1 h; 5: defrost failure; 6: discharge sensor short; 7: outdoor sensor open/short; 9: bonnet sensor fail All brands · Heat Pump
- Excess ice on outdoor coil All brands · Heat Pump
- Extremely high head pressure in heating (dual fuel) All brands · Heat Pump
- Insufficient heat in cold weather All brands · Heat Pump
- Liquid slugging / compressor damage in heating All brands · Heat Pump
- No mode change / wrong mode All brands · Heat Pump
- Odour at registers (dirty sock) All brands · Heat Pump
- Poor heating but OK cooling (or vice-versa) All brands · Heat Pump
- Service problem analysis (Amana chart excerpt) All brands · Heat Pump
- Subcooling too high All brands · Heat Pump
- Subcooling too low vs mfr target All brands · Heat Pump
- TXV bulb/diaphragm failure All brands · Heat Pump
- Water-source: coil freezing All brands · Heat Pump
- Won't change mode / both coils same temperature All brands · Heat Pump
- Wrong superheat after line-set change; poor capacity All brands · Heat Pump
- 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 18 A1000BA status/fault list, p.26-27. 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.