The E2 error on a Hisense dehumidifier signifies a faulty ambient temperature sensor or a disconnected wiring harness. Nine times out of ten, replacing the thermistor or reseating the connector on the main control board resolves the issue. This code acts as a safety lockout to prevent the unit from running when it cannot accurately sense room air temperature.
So basically your dehumidifier just sat down and quit, and now your basement's going to feel like Florida. If you ignore E2, the unit won't run at all, which means mold risk goes up fast. Most of the time when I show up to one of these, the connector at the control board is just loose from vibration. Ten-minute fix. Sometimes the thermistor itself is shot and needs swapping out, but even then it's a $15 part.
OK so here's the deal with E2. Your Hisense dehumidifier has two separate temperature sensors, and this one watches the air coming in from the room, not the coils. When that sensor sends back a weird reading, the board shuts everything down. Honestly this is pretty common on the 50-70 pint Hisense units and the fix is usually cheap, under $20 for the part. I replaced three of these last month alone.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Defective ambient thermistor75%
Loose wiring harness15%
Main control board failure10%
Symptoms You May Notice
E2 flashes on the display the moment you plug it in, usually with a beep, and the compressor never starts even though the fan might spin briefly.
Your basement starts feeling noticeably more humid and you realize the unit's been sitting there doing absolutely nothing, possibly for days.
Fan runs at normal speed but there's no cold air or any real airflow from the top because the compressor is completely locked out.
The unit powers up, beeps once, shows E2, and just sits there like it's given up on life.
Can you reset a Hisense dehumidifier to clear the E2 code?
Unplug the unit from the wall and leave it unplugged for at least 30 seconds. Some sources say 10 seconds but I always do 30 to let the board fully clear. Plug it back in, then press the Power button. If the underlying sensor issue is fixed, E2 won't come back. If it returns within a few seconds of startup, the reset didn't fix the hardware problem and you need to go diagnose the sensor or the board.
Tools Required for Diagnosis
Phillips #2 screwdriverDigital multimeterNeedle nose pliersPlastic pry tool or spudgerElectrical contact cleaner (optional)
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range10000–15000 ohms
ConditionIf Open (OL) or infinite, replace component.
Frequently Asked Questions
Can I bypass the E2 error to keep the unit running?
Short answer: no. The board literally won't authorize the compressor to start without a valid signal from that sensor. It's not a setting you can toggle, it's hardwired into the control logic. And honestly you wouldn't want to bypass it anyway, because without ambient temp data the unit could ice up solid or run the compressor into conditions it can't handle. Just fix the sensor. It's a $15 part and a 20-minute job.
Is the E2 sensor different from the E1 sensor?
Yeah, totally different sensors. E1 is the defrost sensor, it clips right onto the evaporator coils and monitors coil temperature. E2 is the ambient sensor, it reads the air coming into the unit from the room. They look similar but they're different parts. A lot of people order the wrong one, so make sure you're getting the ambient thermistor specifically. Hisense sometimes sells them as a pair, which is actually the smart move since you're already in there anyway.
Where can I buy a replacement Hisense thermistor?
PartSelect, Repair Clinic, and Amazon all carry these. Search for your full model number plus 'ambient thermistor' or 'temperature sensor.' The part usually runs $10-20. Just make sure the connector type matches what you pulled out, some models use a different pin configuration. I've also seen people pick up a generic NTC 10k thermistor from an electronics supplier for a couple bucks and it works fine as long as the resistance specs match up.
Will a hard reset fix an E2 error?
Maybe, but probably not. If E2 showed up because of a one-time glitch or a connector that happened to work itself back in, then yeah a reset might make it disappear. But if the thermistor is physically broken inside, no amount of unplugging is going to fix that. Always worth trying a 30-second unplug first before you start taking things apart. Takes 30 seconds, costs nothing. Just don't expect miracles.
How much does a professional repair cost for E2?
Expect $100-150 for a service call plus labor, and the tech's probably going to be in and out in 20 minutes. The part itself is under $20. That's why this is one of those repairs I genuinely recommend doing yourself. You don't need any special skills, just a screwdriver and a multimeter. If you're not comfortable with the multimeter part, just replace the sensor on faith for $15 and see if it fixes it. Odds are in your favor.
My unit is fairly new. Should E2 even be happening?
I see E2 on units that are less than a year old pretty regularly. Usually it's just a connector that didn't get fully seated at the factory. Warranty covers it if you're still in the coverage period, so call Hisense support before you open it up yourself. Once you crack the case it gets complicated with warranty claims. If you're out of warranty or just don't want to wait three weeks for a service appointment, it's an easy fix you can knock out in an afternoon.
Models Known to Experience E2 Errors
This repair applies to most Hisense dehumidifiers with this error code. Common model numbers include: