Daikin Error Code 2AC: Cooling, high stage (Furnace)
Daikin error code 2AC on a furnace means: Cooling, high stage. It is also called Daikin diagnostic code 2AC.
Homeowner? What Daikin code 2AC means for you
Usually minor Your furnace is reporting: Cooling, high stage. 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.
- Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
- Make sure the furnace front door or panel is closed properly; many furnaces will not run with the door switch open.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
- Check that the gas valve next to the furnace is open (handle in line with the pipe). Do not force it.
- 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 Daikin error code 2AC mean?
Shown on a high-stage cooling call (Y2). The compressor and condenser fan run, and the circulator comes on at cool speed after the cool-on delay. Normal operation.
Applies to: Daikin DR96TN/DD96TN two-stage furnaces
Daikin models that use code 2AC
DD96TN0403BNDD96TN0603BNDD96TN0803BNDD96TN1005CNDR96TN0303ANDR96TN0403ANDR96TN0603ANDR96TN0603BNDR96TN0803BNDR96TN0804CNDR96TN1004CNDR96TN1005CNDR96TN1205DN
Other Daikin Furnace codes
All Daikin Furnace error codes →
Daikin code 2AC: homeowner questions
What does Daikin code 2AC mean?
Cooling, high stage. Shown on a high-stage cooling call (Y2). The compressor and condenser fan run, and the circulator comes on at cool speed after the cool-on delay. Normal operation.
Is it safe to keep using my furnace with code 2AC?
Usually yes. Code 2AC is normally minor, but if it keeps coming back have it checked.
Can I reset Daikin code 2AC myself?
You can try one reset (power off for 30 seconds, then on). If Daikin code 2AC comes back, the cause is still there and a licensed technician should check it.
Who can fix Daikin code 2AC near me?
Aurora Star Tech Inc. repairs Daikin furnaces in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean
Troubleshooting guides
- Blowing cold air All brands · Furnace
- No heat All brands · Furnace
- Short cycling All brands · Furnace
- Control display blank, furnace dead - Daikin DR96TN/DD96TN Daikin · Furnace
- Furnace not paired with R-32 cooling - disable A2L function - Daikin DR96TN/DD96TN Daikin · Furnace
- No heat - Daikin DR96TN/DD96TN Daikin · Furnace
- Reset the furnace control to factory defaults (rFd) Daikin · Furnace
- Run the R-32 leak function test (A2u) Daikin · Furnace
- Turn off R-32 monitoring when no R-32 system is fitted (A2E) Daikin · Furnace
- View and clear the stored faults (L6F / F10) Daikin · Furnace
Source: Daikin DR96TN-DD96TN service RSD6612304 (05-2024), 2 Stage Status Codes p.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.