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Fix Overheating Error in Dyson AM09

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  1. Fix Overheating Error in Dyson AM09, Where to clean: step 1, image 1 of 1

    • The red arrow indicates the area where we'll focus our cleaning efforts.

    • Start by powering the fan on. Then, switch it to the highest setting.

    • Use compressed air aimed at the crevice toward the back part of the fan (where the arrow is pointing).

    • Be ready for a lot of dust to come out as this area can get quite dirty over time!

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  2. Fix Overheating Error in Dyson AM09, Remove fixing bolt for air slot manifold: step 2, image 1 of 1

    • To access the heating elements, you need to take off the top part that sits above the cylinder with small vent holes. The entire section above the separation line can be removed as a single piece.

    • To begin, take off the D-shaped screw cover located at the bottom of the oval by pulling it upwards. Once you remove the cover, you'll see a T8 screw that needs to be unscrewed to move forward.

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    • To unlock the part, twist it 15 degrees counterclockwise. The cylindrical base can be tough to grip, so use a belt as a strap wrench instead.

    • Some devices have a 'grippy' finish, which makes this easier.

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    • If you're having trouble working with the cables, you can try removing the fan core from the tilt stage. To do this, unscrew the four T8 screws located beneath the fan core (two screws are visible at each of the maximum tilt positions). This will allow you to separate the fan core and make it easier to work with the cables.

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  6. Fix Overheating Error in Dyson AM09, Managing the wires: step 5, image 1 of 3 Fix Overheating Error in Dyson AM09, Managing the wires: step 5, image 2 of 3 Fix Overheating Error in Dyson AM09, Managing the wires: step 5, image 3 of 3

    • Two T8 screws hold down the cover over this. The blade connectors have a little tab lock that must be pushed while pulling them apart.

    • The black wire is for the temperature sensors.

    • The white wire is for power (disconnects near the base, under a woven sleeve that slides out of the way. You don't need to touch the heatsink). The servo connector pulls apart easily.

    • The arrows show the 4 places to disconnect the wires so you can separate the top from the bottom. The white connectors under the sheath may also have a tiny lock tab that you need to push in while pulling them apart.

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  7. Fix Overheating Error in Dyson AM09, Optional: servo and plate: step 6, image 1 of 1

    • There are two bolts holding the servo down (removed in this photo), and two holding the white plate down. It is not necessary to remove these, but might make things a little easier a couple steps from now.

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  8. Fix Overheating Error in Dyson AM09, Cut around the edge of the air slot trim: step 7, image 1 of 3 Fix Overheating Error in Dyson AM09, Cut around the edge of the air slot trim: step 7, image 2 of 3 Fix Overheating Error in Dyson AM09, Cut around the edge of the air slot trim: step 7, image 3 of 3

    • Use a boxcutter to repeatedly score around the sides and top of the outside trim, in order to gain access to the heater cores. This is glued in place, but around the bottom it is a small amount of glue, so if you completely separate the top and sides you can break the glue at the bottom. The air slot core with heaters will slide out.

    • Be very careful here. Use the thinnest blade possible and repeatedly score rather than doing it forcefully. This is hard to without damaging it.

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  9. Fix Overheating Error in Dyson AM09: step 8, image 1 of 3 Fix Overheating Error in Dyson AM09: step 8, image 2 of 3 Fix Overheating Error in Dyson AM09: step 8, image 3 of 3

    • Two bolts allow you to pull the heater slot cover, which allows you to remove the heater cores. They can be turned out without bending any of the tabs. The same is true of the temperature sensors. The caked on (and toasted) dust can simply be vacuumed off.

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Conclusion

To reassemble your device, follow these instructions in reverse order. Tape the air slot assembly to the outside of the outer housing, or simply ziptie the top of the loop.

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breadandbits

Member since: 07/19/20

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10 Comments

Hey, thanks for posting this. I used it as a general guide for my Dyson AM01 which also was throwing an error when using the heat function. Opened it up expecting to find and least some dust on the heating elements… and to my surprise and annoyance they were basically clean.

Any thoughts or other ideas? Not sure if there is a temp sensor incorrectly reporting the temperature of the heating elements that I can try to replace?

Thanks

David - Reply

Hi All, thanks for the walkthrough on opening up the heating elements. Same as David, I put up filters around the air intake since day 1 of owning the unit and the elements are clean without any clogs. (Confirmed once I opened up the unit).

I still get the H2 error whenever I use the heating function, I noticed that if I turn it to around 23-24C with the lowest fan speed, the H2 error may not come on. And often time I cannot increase fan speed probably due to some issues with the circuit board or components. I'm suspecting that the H2 error may be due to electrical/component failures because I have 2 units and both experienced H2 error.... I'm suspecting that they were built to have a life timer or something, and when the time comes, it'd fail no matter what.


Did some digging around on the components and it seems that the 2 components next to each heating elements are thermal switch and thermal fuse, I think that's just for safety purpose and they're not heat or flow sensors.

cAL - Reply

Yea I had actually unplugged the heating elements and set it to heat and still sometimes got that H2 error, which means its not from overheating... since it literally wasn't heating up then :(

David - Reply

I'm stuck on step 7 since I don't know exactly where to cut. Is the air slot trim the silver/gray part on the outside? Is there any way more pictures could be provided? Thanks!

Thien - Reply

It is the outer grey rim that needs to be separated from the white body. See edits to the instructions for photos and details.

Adrian -

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