E3 error My DE500P flashes an error code E3 on the display. Can you tell me what that means? If there is a part that needs replacing can you point me to the right part? Thanks!!!!

I got mine fixed tonight! It was not that easy but can be done.
After my last post, I called the customer service of DeLonghi. The agent can only refer me to the authorized repair shops but she does not know what “E3” meant. There is no shop in NJ where I live, and the closest one is in CT! One of the two shops there knows right away the E3 is the fault of a condenser sensor. He mailed me the part ($25) and I took the covers off (be very careful to record where the screws are from ---- they are not all the same size/shape, and also there are two small tabs on the top holding two cover pieces together, so don’t force it to open or you will break it). There is only one part looks like the same as the replacement part I newly obtained and it has a metal clip attached on the copper coils. Carefully replace the sensor on the coil as you find previously and plug the other end to the control board. It sounds lengthy but once you open the cover it will all become clear to you. Be patient and this can be done. Very glad to see/hear it is working now again!

p.s., the store first mailed me the wrong part (on the plug-in end it has two ridges rather than one) so I have to call them again to explain and they mailed me a different one with a single ridge. Apparently there are two types (old and new model) for this model.

Thanks Speedy for the information.

Have the same E3 message on a DE300P. It doesn't seem to be a sensor problem on this one which is already like 10 years old. I opened it and cleaned what seemed to need cleaning, especially what collects the water below the radiator, a hole was more or less blocked and so the water led to another part (towards the pump?); I noticed some of the transparent tubes were dirty too, those going to the pump, but as I never use it I didn't bother cleaning them.
Thank you for the tip on how to reset, I had to do it several times so maybe there is another issue. It also seems the device really needs to be on a horizontal surface now (it's in a cellar and the floor is irregular, it didn't use to be a problem, so as I said maybe there is another issue) Now it runs again and I''ll keep my fingers crossed...

I did the self test (see above....unplug, hold down the power button, then plug in and continue holding down power button. It went through the self test and started to run....ahhhh but for just a second and shut down and dipslayed E3 agian. Good try.

Be Safe or don't do it....

On the side with the lint screen, remove the five screws holding the top panel in place. The sensor that needs to be checked in mounted on the radiator fins. Remove the sensor and 4 pin connector. With a pin, remove the loose fitting housing the "sensor"...a circuit board that "shorts" with condensation...check corrosion and look for component damage on the oft chance the circuit board was damaged by some inappropriate poking or mechanical failure. Reassemble and replace sensor...

For a short life span...or out of warranty and only at your risk (IF have significant other or kids or pets or human DNA... don't do this...) .. guide wire through screen notch and attach to outer screen. Build fortress around exposed sensor and talk to insurance agent for a special rider...seriously be careful.



Did you? Clean screen and GENTLY clean fins of lint, etc....(vacuum's brush head should do the trick...)

Taking all appropriate safety precautions.

...


Here's the 100,000 (yen) tip....with humidifier unplugged, hold down the power button (green button in lower center) and plug in the appliance.

Watch the LCD screen as it conducts a self test...and wha...lah!.

Should have a working humidifier!

E 3 means syatem low pressure protection and its indication is the unlighted 3s ans untwinkled 3 times