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I understand your Frigidaire dehumidifier, model# FAD704DUD, does not turn on when it is plugged in. I also see that the display lights up briefly and there are no error codes. Your appliance is designed to operate between 41 degrees F (5 degrees C), and 96 degrees F (35 degrees C). It will not work properly if the temperature is out of this temperature range, or the performance of the unit will fall greatly. The "Compressor" circuit has an automatic 3 minute time delayed start if your dehumidifier is turned off and on quickly. This prevents overheating of the compressor and possible circuit breaker tripping. Make sure the tank is fitted correctly otherwise your appliance will not turn on. If you are still having trouble, you can contact your local authorized technician for further assistance. Hope this is helpful.
Since you have had 2 seemingly unrelated symptoms it is almost sure you have had a power board failure. If you post back with the complete model number we will try to check everything and see what we can come up with.
E2 Code indicates a Sensor Error automatic shutdown. To find out which sensor it is you will have to call Haier Customer Support
In the meantime, turn the unit OFF & unplug it for 15 minutes. Then plug the unit back in and turn ON. ON. Hopefully the unit reset itself and reverted back to the original factory settings. And you can set te humidity extraction level where you desire. If the error code reappears, definitely contact Haier, as youtr unit is still under warranty.
Assuming that the unit is plugged in to an outlet that has power, press the ON button and a green light should come ON. That will indicate the unit is getting power and is ready to function. If however, you have the humidity level set to high and it's equal to or higher than the humidity level in your home, the unit's compressor and fan will not turn ON and run. Keep in mind, the humidity level, whether it's and LCD readout screen or just a minimum and high setting, that's not the amount of humidity that the unit will remove. It's what it will maintain. So, setting it as low as possible, should cause the unit to start functioning.
If it doesn't start, check the water collection bucket, to be sure that it's installed properly and is making contact with the safety trigger switch. If it's not making contact, the unit will not turn ON.
Hope this info helped you. Please let me know. Thanks.
If you're not getting any indicator lights, check the receptacle that it's plugged into. Is their power to it? If not, the circuit breaker in your home's circuit breaker panel may have been tripped. Or the outlet itself may be faulty (loose wire, poor connection, etc). If the indicator lights are working, but the compressor is not, turn the Master ON/OFF switch on the unit to OFF and wait 10 minutes before plugging it back in. This will give the electronics time to reset themselves.
When you push the power button, the blower fan comes on. In a few
minutes you should hear a second "click"--that is your compressor
starting. Do you hear that second click?
The compressor is located in the rear bottom on the right side looking at the machine. After you press the start button and the blower fan comes on, bend over near the back of the unit and listen for the "click".