JBL CoolControl
Thermostat to regulate 12 V cooling fans for aquariums

  • Regulates the cooling fan operation: thermostat regulates from 1 - 50 W (JBL Cooler, all sizes)
  • Simple installation: connect CoolControl to the cooling fan and sensor. Plug in power supply
  • Temperature setting wheel 18-36 °C, diode for function control, temperature sensor for measuring the water temperature, DC 5/2 mm plug
  • Switch for automatic, manual or Off, diode for function control, operating voltage 12 V DC over power supply of cooling fan
  • Package contents: thermostat for 12 V cooling fan, CoolControl
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Recommended retail price incl. VAT
Available from your specialist dealer.
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You can find this article at your specialist shop and online
Product information

Temperature control
There are two important factors which affect the water temperature in the aquarium: firstly the room temperature and secondly direct sunlight. If the room temperature in summer increases significantly, it is important to check the temperature in the aquarium regularly. It should be 24-26 °C. Temperatures above 30 °C are a problem and can cause substantial damage to fish and plants. Furthermore aquariums should never be exposed to direct sunlight. The higher the temperature, the less effectively the oxygen, which is vital for the animals, dissolves.

Easy to install
Connection of JBL CoolControl with 5/2 mm plug to the cooling fan and sensor.

Cooling by evaporation
The JBL CoolControl controls cooling fans (e.g. JBL Cooler – all sizes). The fan makes the warm water evaporate at the water surface and thus generates cold. Comparable to evaporation cooling of a wet body part which is exposed to the wind.


JBL CoolControl

Art. no.:
EAN Code:
12 V
Volume packaging:
0.480 l
Gross weight:
109.000 g
Net weight:
84 g
Weight factor:
35/185/75 mm

Technical Data

The JBL CoolControl does not switch off when it reaches the set temperature.

Please check whether the setting switch is set to “Auto”. The control unit does not switch when set to “Manual”.

Does my CoolControl work with every aquarium aerator/cooler?

The JBL CoolControl was designed for use with the JBL Cooler, and they work together perfectly. Due to different voltages, flawless function cannot be guaranteed for use with appliances from other manufacturers. Even the connector, which is optically identical at first glance, may be of varying thickness. As a result, a cooler from a different manufacturer may cause unwanted switching, leading to noises in the relay.

Blog – Opinions & Experiences


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Now even more safety with the free JBL GarantiePlus

Buyers of JBL technical products can rest even more on the safe side now because JBL is offering them a guarantee claim for two additional years free of charge. Just register your product online within the 2-year manufacturer guarantee ...

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The JBL Cooler Test

JBL took the first heat wave as an opportunity to test the JBL Cooler at high room temperature.

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JBL is truly cool!

Summer and winter are a good thing, but not for aquariums! JBL provides a remedy with its cooling concept.

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Laboratories and calculators

Water Analysis Online Laboratory

Enter your water parameters and get an in-depth analysis of your values in a matter of seconds. You enter your water values – and we analyse! Here you have the opportunity to enter the measured water values directly into the JBL Online Laboratory. This will analyse your values and explain and submit corrective measures.
Worth reading


With the guarantee extension JBL GarantiePlus you secure your extra-long extended 4-year guarantee from the date of purchase for your JBL product. Do not miss out on your extended guarantee claim!

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Product tests & info

  • JBL CoolControl-DATZ Produkt des Monats
    114 kByte

safety instructions

  • safety instruction for technical devices
    18 kByte