Hwd1000 washer/dryer combo. Why isn't it drying and displays EC4?

What’s the description on the error ?

it would suggest you have a leaky water inlet solenoid .

From the document I see, it is only a matter of pressing the "Dry" button. This is from the manual, available at http://www.lg.com/us/appliances/washer-dryer-combos/LG-WM3431HW.jsp and selecting the "Support" tab. On the right, there will be a "Washer/Dryer Combos Manual" link, which will download to your computer. Listed under "Dry" in Section 9 is the following.
• Drying options are easily selected with the Dry button. • For most even drying , make sure all articles in the clothes load are similar in material and thickness. • Do not overload dryer by stuffing too many articles into drum. Items must be able to tumble freely • If you open door and remove load before dryer has finished its cycle, remember to press the Start/Pause button. • By pressing the Dry button, you can select "Normal" - "More" - "Time" - "Off" - "Low Temp" - "Less" • Your dryer can handle a load of up to 9 lbs. (4 kg) dry weight of articles. • When drying cycle is completed, [Cd] (Cool Down) is displayed on the Multi display. • Cool Down is set automatically when the drying cycle is complete. • If clothes are not removed promptly when the drying cycle ends, wrinkles can form. • The Cool Down feature periodically tumbles, rearranges and fluffs the load to avoid wrinkles for up to 4 hours. • The message [Cd] will continue to display until the clothes are removed or the Start/Pause button is pressed
Hope this solves your problem. I highly recommend downloading the users manual, it is a wealth of information and will prove useful in many circumstances.
Please rate and comment Thank You Joe

Error U04 means the door is open.

Put your knee against the door handle and press it against the handle until you hear a click. The machine should start filling within a minute.

This is a problem I had start occurring about a month after I started using the machine. You will soon do this for every load, a minor annoyance on a cheap machine.

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Error EC4 refers to the temperature of the air vent.
Within 30 minutes of dry cycle there is 5 minutes in which the temperature is not increasing.

Ask the technician to
repair it.

Alternatively make a custom cycle with no drying cycle and hang dry the laundry. I usually do this myself as opposed to listening to it groan for 2-3 hours.

EC4 is regarding: The temperature of air vent.

Within 30 minutes of dry cycle there is 5 minutes in which the temperature is not increasing.

The dryer heater is not working properly. Call a repair technician.

Alternatively, create a custom wash cycle with no dry cycle and hang dry the laundry if you are past warranty and do not want to pay to repair it.

Its time you found out where your filter is to clean out thoroughly

It's time you found out where your filter is, to clean it out thoroughly

please repost for i have no knowledge of the haier productline

solved!!!! theres a flaw in the machine, lint builds up in air return area from the back of the machine to the heater, takes about 45 min to fix, take off lid and back pannel, remove weight, remove heater wires and hoses, remove plastic air return area, clean out lint, put back together, the air temp sensor is in the plasic housing in the rear of the plastic housing, the lint blocks air from circulating and triggers warning

EC4 The temperature of air vent
Within 30 minutes of dry cycle there is 5 minutes in which the temperature is not increasing.

You need to call for repairs. Probably the heating element is faulty.

You can create a custom program without a dry cycle and hang dry your clothing.