Aquarium heater helps to maintain warm and stable water temperature, which is critically crucial for tanks, like tropical fish tanks. In our guide below, we will cover common troubleshooting of hygger aquarium heaters, along with how to repair the heater and how to set a heater’s temperature. After reading, you will know more about aquarium heater fixes.
Content Table
Common Troubleshooting of Aquarium Heaters
To begin with, we will list the common troubleshooting of aquarium heaters:
- Improper placement
- Excess temperature
- Too low temperature
- Temperature difference
- Over voltage fault
- Sensor fault
- Components fault
Besides that, sometimes you may be confused about the error codes. Consequently, next, we will share some specific examples.
1.001 Submersible Aquarium Heater
| Error code | Causes |
| E1 | The aquarium heater is exposed to the air |
| HH | The water temperature is above 95℉ |
| EE | The two sensors detect a 5° temperature difference |
| E4 | Over voltage fault |
| H1 H2 E2 E3 | The temperature sensor is short-circuited protection |
2.003 Variable Frequency Aquarium Heater
| Error code | Causes |
| LL | No.1 temperature sensor fault |
| HH | No.2 temperature sensor fault |
| E1 | The heater is out of water |
| E2 | The heater is placed somewhere with bad water recycle Components fault |
| E3 | The heater is placed somewhere with bad water recycle Components fault |
| E4 | Flat power grid interference |
3.007 Quartz Submersible Aquarium Heater
| Error code | Causes |
| E1 | The aquarium heater is exposed to the air |
| HH | The water temperature is above 95℉ |
| EE | The two sensors detect a 5° temperature difference |
| H4 | Over voltage fault |
| H1 H2 E2 E3 | The temperature sensor is short-circuited protection |
4.011 Smart Aquarium Heater
| Error code | Causes |
| Er & beeping | The heater is out of water/Sensor fault |
| Water temperature flashing & beeping | The water temperature is above 96.8℉ & poor water circulation or improper placement of the heater |
| Ec | Components fault |
| E3 | Relay fault |
| H1/H2 | Temperature sensor fault |
| White or yellow dirt adheres | Incrustation scale |
5.045 Tiny Titan Water Heater
| Error code | Causes |
| Er | The heater is out of water |
| EE flash | The temperature is above 95℉ |
| The heater turns red indication when it is out of water | Failure of the outwater shutoff function |
| The heater is working but can not reach the setup temperature | The ambient temperature is below 50℉ |
| H1 | Probe is broken |
| H2 | Probe is broken |
| E1 | Probe is broken |
| E2 | Probe is broken |
| E8 | Probe is broken |
| EL | Reminder after 10,000 hours of use |
6.060 Ultra Short Aquarium Quartz Heater
| Error code | Causes |
| LL | The temperature is lower than 59℉ (15℃) |
| HH | The temperature reaches 95℉ (35℃) |
| EE | Sensor fault |
| L1 | The heater is out of the water and exposed to air |
7.921 Aquarium Water Heater
| Error code | Causes |
| ER | The heater is exposed to air |
| EE | Water temp exceeds about 97°F |
| H1 | Temp sensor one is a short-circuited protection |
| H2 | Temp sensor two is short-circuited protection |
| E1 | Temp sensor one is open-circuit protection |
| E2 | Temp sensor two is open-circuit protection |
| E3 | The relay is melted |
8.969 hygger aquarium heater
| Error code | Causes |
| Er | The heater is exposed to air |
| EH | The water temperature is above 97℉ |
| Ec | Communication failure |
| E3 | The relay is melted |
| H1 | Temp sensor is short-circuited protection |
How to Repair an Aquarium Heater
In this segment, we will list remedies for some common heater faults.
| Faults | Solutions |
| The temperature is below the minimum level (too low temperature) | Increase the water/room temperature (e.g. add another aquarium heater/warm water for water changes/open heating fan/add an aquarium heating blanket) |
| The temperature reaches the maximum level (excess temperature) | Decrease the water/room temperature (e.g. open the air condition/open the cooling fan/add float ice packs in the water/avoid direct sunlight) |
| Sensor fault | Return the heater |
| The heater is exposed to air or out of the water (improper placement) | Fully submerge the heater in the water |
| 5° temperature difference detected by sensors | Discard the heater |
| Over voltage fault | Discard the heater |
| The temperature sensor is short-circuited or open-circuit protection | Discard the heater |
| Several degrees of differences between the water temp and the desired temp | Place the heater on the tank with great water circulation (e.g. the stream of a powerhead/the inlet or outlet of the aquarium filter/water pump) |
| Components fault | Check whether the water temp is over the maximum level or not. If it is above the maximum point, discard the heater. |
| Flat power grid interference | Restart |
| Relay fault | Re-plug in. If the heater can not be restored, then discard it. |
| Incrustation scale | Rinse the heater with clean water |
How to Set an Aquarium Heater’s Temperature
Additionally, how to set an aquarium heater’s temperature? Take a fully submersible heater as an example, you can set the desired temperature easily by pressing the “SET” button and choosing between 59 and 93℉. Provided that your set temp is 82℉, the heater will shut off automatically once the temp reaches the set point. Moreover, while heating, the light on the display will flash. It will stop flashing once it reaches the set temperature.
Reminder
If you want to get an aquarium heater, you should refer to the chart of the recommended tank and heater size, then you can choose the most suitable heater for your aquarium. Also, for safety during the cleaning process, you should unplug the heater first and leave it in the tank until it is cooled.
That’s all for today. For additional questions about hygger aquarium heaters, welcome to leave messages in the comment or contact us. We are happy to help you out. Finally, thanks for your time.
Related Products
I have a Hygger 300w submersible Quartz,
Temp is set at 79 degrees, It is showing HH and sounding alarm even though the actual waster temp is only 75 degrees. I’ve unplugged and reset and it does it again a few hours later. It is in good location and great water current. It is only 2 months old
Sorry for the inconvenience caused to you.
To solve the issue more accurately, would you shoot a video about the timer setting and send it to [email protected]?
hygger customer service is waiting for you to solve the issue.
Thanks
Hello good evening my hygger 500w has an error code H1 does that mean I have to buy a new one?? 😔
Does your hygger heater under the warranty? if so, you can get a new one for replacement.
Please emaill the order No. and time to [email protected],
hygger customer service is waiting for you.
Thanks
I have a Hygger 800w and the heater is saying the water is way warmer than what the tank is actually at. How do I get the heater working properly again. I have had the heater for about 13 months. Please help!!
To solve the issue more accurately, would you shoot a video about the timer setting and send it to [email protected]?
hygger customer service is waiting for you to solve the issue.
Thanks
My 902 is showing the water temp over 175F which keeps the heater from turning on.
What can I do
Sorry for the inconvenience caused to you.
To solve the issue more accurately, would you shoot a video about the timer setting and send it to [email protected]?
hygger customer service is waiting for you to solve the issue.
Thanks
Just got my 300w hygger heater today and the lcd controller is reading 90+ degrees when its no where near that temp in my tank. Tried everything to bypass the issue but it keeps reading high temp and wont turn on the heater. I tested it in cold water which was in the 50s and it was saying it was in the 70s? Unless this can be fixed I wouldn’t recommend this product to anyone unless you want to waste your money!
Sorry for the inconvenience caused to you.
The hygger service team is waiting to fix your issue of the heater. Please shoot a video and email it to [email protected].
hygger team hopes to solve the issue more accurately for you.
Thanks
I have a HG043 double quartz heater, alarm keeps sounding and blinking auto shut off. I have removed heater and cleaned it, and resubmitted it but alarm persists and won’t clear. My tanks are getting cold I’m going to have to do something pretty quick
Hi Alisha Brightman,
Sorry for the inconvenience caused to you.
Please shoot a video and sent to [email protected]
hygger customer service is waiting to solve the issue more accuracy for you.
Thanks
Just got a new HG031 on the indicator the code is SL and the heater is totally submerged. What’s wrong?
Hi Gloria,
Sorry for the inconvenience caused to you.
Please shoot a video and sent to [email protected]
hygger customer service is waiting to solve the issue for you.
Thanks
Hi,
I have a similar issue whereby the outreader is permanently saying 28 Celsius when in fact the water temp is much colder. Any suggestions?
Hi Damien Cox,
Please shoot a video and sent to [email protected]
hygger customer service is waiting to solve the issue for you.
Thanks
I’m having the same issue with my 200w hygger marine heater. This happened twice, the heater controller says the water temp is higher than the actual temperature so the heater doesn’t turn on. It happens after about 1 year of use. I got a free replacement and it happened again with the new heater Hygger sent me. Right now it says my tank is 86 degrees but it’s set to 79. The actual water temperature is 75 degrees. I always keep a regular thermometer in the tank if I have digital for this reason. Either the controllers are bad or they want you to buy a new heater every year.
Hi David,
What the model of your heater?
Please take a video of the issue and send it to [email protected].
Customer service will give you appropriate suggestions based on the issue of the heater.
Thanks for your patience
I have the hygger Hollow Double Tube Quartz Heater (HG106) and it worked flawlessly for months and out of nowhere it has been reading that the water temperature is in the 90+° when in reality the water is maybe 73°. I have unplugged it and cleaned it multiple times the past two weeks thinking maybe that was the issue but it is still reading that way and last night it claimed to be 96° and was beeping saying it was to hot and I opened the lid and the water was actually very cold. Is there a way to somehow reset the sensor or something to get it back to working ( reading ) properly.
Hi Brent,
Sorry for the inconvenience caused to you.
Please take a video of the issue and send it to [email protected].
Customer service will give you appropriate suggestions based on the issue of the heater.
Thanks for your patience