Is my humidity sensor circuit board toast?
after cleaning my dehumidifier, and letting it dry. i plugged it in and it gave a reading of 20% humidity. when i blow on the humidity sensor, the humidity reading climbs, but quickly falls to 20% again. I know that the humidity is higher that 20% in my house (the windows are fogging up, and i have another humidity meter that is reading around 59%).
Hi, I just cleaned my dehumidifier and had the same problem as you. I used a spray water bottle and was not aware that the humidity sensor was being soaked. Very stupid of me!! Luckily I have two same dehumidifiers and used the other sensor to replace the one that I so stupidly ruined, and behold my machine worked again. Now I have to buy another sensor. To make sure we are talking about the same thing, my sensor is white,about 1 inch by 1/2 of an inch. It as 4 wires connected to it. To access it you remove the water tank, you will see 2 screws. Remove those, and pry the front panel loose. Be careful the top of the panel is held by two plastic hooks, they break easy. The sensor is located on the right side just above the radiator, under a produting oval lip which as foam around its rim. The wire colors are red black blue and yellow. Good luck
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In addition to a faulty humidistat sensor, there are 5 basic, yet solvable reasons for what you described. Please pay particular attention to numbers 1 & 2. 1. The humidity extraction level is set to HIGH. Lower it to 32-35%.
2. Air intake filter is dirty or clogged. Turn unit OFF, & Unplug the Unit, before removing to inspect & clean it, if necessary. If washed, allow filter to completely dry before reinstalling. DO NOT operate the unit without the filter.
3. Obstructed air flow. Maintain a minimum of 12 to 18" of clear air
space around the entire unit.
4. Cooling coils are dirty and need to be cleaned. Use warm water & dish washing liquid to clean the coils. Rinse and wipe dry. Apply a light coating of WD40 to the coils.
5. Ambient air temperature at floor level is between 40 - 60 degrees.
dehumidifiers do not work well between those temperatures (Unless, you have a Low Temp Unit). This applies mainly to where the air
temperature at floor level is colder than at shoulder level in basement applications. Raising the unit up off the floor, onto a sturdy table, counter top, etc, that can handle the weight of the unit, plus a full tank of water, will usually resolve this problem.
none of the above solves the problem, contact Haier Customer Support 1-877-337-3639, before your warranty expires.Haier units will generally show an E1 code if a sensor or circuit is faulty and unit will not run at all.
I hope this helped you troubleshoot & solve the problem
Hi, It could be just the sensor, but not likely... many times it is the circuit board that goes bad, making the repair almost prohibitive.. as the circuit board, if you can find one, is often half or more the cost of a new unit... But you are correct... if the unit thinks the humidity is 20% then it will not bring on the compressor...that is what is happening...
If the humidity level is at or lower than 30%, the unit won't turn ON, until the reaches 35 - 40%. It's rare for the sensors to go bad. Just keep in mind, the dehumidifier is reading the humidity near the floor, not up at say, chest level. Humidity levels change every season, so this really would not be that unusual. Make sure that your clean the air intake filter regularly. Cleaning and wiping down the coolant coils would be a good idea, too..
It probably doesn't need adjusting, It's simply a case that 20%, there's not enough humidity for the sensor to read. But, at 35% there is. I'd say, your dehumidifier is working as it should. FYI - there is no adjustments to change the factory settings.
Possibly the primary humidity sensor behind right side grill. Unit MUST be unplugged from outlet. Take right side grill out, unplug sensor from wire socket and plug back. If no help, you need new sensor.
This error code indicates that the problem is most likely a shorted defrost thermistor or possibly a pinched wire going to the thermistor. You will need to replace the sensor assembly - part # 6877A30013L. The Sears website has it listed for 9.99 + shipping. The humidity sensor & defrost thermistor come together in a wiring harness that plugs onto the main circuit board. It is fairly simple to repair. Just remove the front & rear grill & the metal cabinet. Remove the thermistor from the copper tube on the cooling lines; remove the humidity sensor from the front of the evaporator; pull the wire plug off the bucket switch; & remove the small 7 pin plug from the main circuit board inside the metal control box. Reverse procedure to install new sensor assembly.