E6 is the kind of code that tells you the system is not breathing right. It means the indoor unit’s fan has stopped or is not spinning like it should. Not great. Turn the unit off now. Running it without airflow can freeze the coils and make things worse fast. Some causes are simple to check. Others need a technician.
Does This Apply to Your Unit?
This guide is for Della wall-mount mini splits. Not all Della units speak the same language. If you have a Della window AC or portable AC, an E6 code may mean something different. Check your manual or contact Della support to confirm.
Not sure of your model? Look for the sticker on the side of the indoor unit (the part mounted on your wall). The model number is printed there. Have it ready before you call support.
Should You Keep Running It?
No, please don’t keep the unit running. Turn it off and leave it off until you finish the checks below. The fan not running means there is no airflow over the cooling coil inside the wall unit. If you keep it running, the coil can ice over and the system will be forced to work harder than it should.
If you notice any of these, stop immediately and don't restart:
- Burning smell or anything that smells electrical
- Grinding or rattling from the indoor unit
- The breaker tripped when the unit was running
Why E6 Happens
The control board is basically the unit’s brain. It keeps tabs on the fan all the time. If the fan stops or can’t get up to speed, it shuts everything down and throws an E6. There are four likely causes for this, ranked from most to least common:
- The fan blade is stuck or blocked. Something is physically stopping it from spinning.
- The wire connecting the fan motor to the board came loose. A connector popped out.
- The fan motor itself has failed. This needs a technician to test and replace.
- The control board has failed. Least common, technician only.
What to Check
First: cut power completely. Turn the unit off at the remote or wall switch, then flip the breaker for the unit. Don't reach inside a running unit.
Optional: try a power reset before anything else
Cut power at the breaker. Wait 3 to 5 minutes. Then turn it back on. This takes about 5 minutes and can clear a one-time glitch. If E6 comes back, move on to Step 1.
Step 1: Try turning the fan blade by hand
Open the front panel on the indoor unit. Most Della models lift or unclip at the bottom. Power must be off first. Reach in and gently spin the fan wheel by hand. That’s the round cage behind the panel.
It should turn freely with almost no effort. If it won’t spin, or it grinds and catches, something is blocking it.
If it won’t turn freely: start simple. Look for anything obvious blocking it: packed dust, a small object, or even an insect. Remove it carefully if you can see it.
If the fan won't spin and nothing is stuck in the blades, your alignment is shot. Step away from the machine and call a pro. Do not try to force it or you will just snap something important.
The tech has to realign that assembly to get the gears turning. Once they flip the breaker back on, it is the moment of truth. If that E6 code stays hidden, you are back in business. If it rears its ugly face again, it is time for Step 2.
If it spins freely: The fan blade isn't the issue. Move to Step 2.
Step 2: Check the wire connector on the fan motor
Keep that panel open and the power dead. Look at the wiring by the motor. You are looking for the connector plug. It is the lifeline between the motor and the main board. If that plug is loose or hanging by a thread, your system is dead in the water. Give it a look and make sure it is fully seated in the socket. A loose connection is just a breakdown waiting to happen. Check it now or pay for it later.
If a connector is visibly loose: Push it firmly back in until it clicks. Restore power and test. If E6 is gone, monitor the unit over the next few days.
If everything looks connected: The problem is inside the motor or the control board. Stop here. Don't open anything further or test electrical components yourself. These are technician jobs.
If the Checks Above Don't Fix It
At this point a technician needs to take over. Here's what they'll do, so you know what to expect:
- They'll test the fan motor electrically. If the motor has failed internally, they'll replace it and check whether E6 clears.
- If a new motor still doesn't clear E6, the technician runs a further diagnostic to check whether the control board is the problem.
- If the motor tests fine from the start, the control board is likely misreading the fan signal and needs to be replaced.
Don't attempt to replace the fan motor or control board yourself. Both jobs involve electrical connections and components that carry risk if handled incorrectly.
When to Call Support
Get in touch with Della support if:
- E6 comes back every time you restart
- The fan blade won't spin and there's nothing obviously blocking it
- You smell burning or the breaker tripped
- The unit is less than a year old (check your warranty)
- You're not comfortable opening the front panel. That's fine, just call.
- E6 is showing along with something else: not cooling, water dripping, or strange noise
Before You Call: What to Have Ready
Having this ready will save time:
- Your model number: on the sticker on the indoor unit
- Your order number: from your Della confirmation email
- A photo of the E6 on the display
- Whether the fan blade spins freely by hand
- Whether you tried a power reset and what happened
- Any other symptoms: noise, smell, water, not cooling
- How long you've owned it and whether it's still under warranty
You can reach Della customer support through the Della support center. For warranty coverage, check the paperwork that came with your unit or your original order confirmation.
What to Do Next
E6 cleared after a reset
Run the unit and keep an eye on it. If it comes back within a few days, go through Steps 1 and 2 before calling in.
E6 keeps coming back
Check the fan blade (Step 1) and the wire connector (Step 2). If those look fine, schedule a service visit.
Burning smell, strange noise, or tripped breaker
Stop using the unit and don't restart it. Contact support and tell them exactly what happened.
Need more help?
Visit the Della support center for error code guides by model, or check the error code list in your owner's manual.
