Daikin Error Code EE9: High-stage pressure switch did not close (Furnace)
Daikin error code EE9 on a furnace means: High-stage pressure switch did not close. It is also called Daikin diagnostic code EE9.
Homeowner? What Daikin code EE9 means for you
Check, then call Your furnace is reporting: High-stage pressure switch did not close. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
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 EE9 mean?
On a two-stage furnace the high-stage pressure switch does not close when the inducer goes to high speed. The furnace keeps running on low stage only. Flowcharts call this code E9.
Applies to: Daikin DR96TN (upflow/horizontal) and DD96TN (downflow/horizontal) two-stage 96% furnaces with 9-speed ECM motor, R-32 ready
Common causes of Daikin code EE9
- Pressure switch hose blocked, pinched or connected wrong
- Blocked flue or intake, or vent too long / too many elbows
- Blocked condensate drain
A technician checks these and 2 other possible causes on site before replacing any part.
Daikin models that use code EE9
DD96TN0403BNDD96TN0603BNDD96TN0803BNDD96TN1005CNDR96TN0303ANDR96TN0403ANDR96TN0603ANDR96TN0603BNDR96TN0803BNDR96TN0804CNDR96TN1004CNDR96TN1005CNDR96TN1205DN
Other Daikin Furnace codes
All Daikin Furnace error codes →
Daikin code EE9: homeowner questions
What does Daikin code EE9 mean?
High-stage pressure switch did not close. On a two-stage furnace the high-stage pressure switch does not close when the inducer goes to high speed. The furnace keeps running on low stage only. Flowcharts call this code E9.
Is it safe to keep using my furnace with code EE9?
It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Can I reset Daikin code EE9 myself?
You can try one reset (power off for 30 seconds, then on). If Daikin code EE9 comes back, the cause is still there and a licensed technician should check it.
Who can fix Daikin code EE9 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
Source: Daikin RSD6612304 (DR96TN/DD96TN service), 2 Stage Troubleshooting Codes, p.28-29; Error Code E1, E2, E8, E9 flowchart p.36. 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.