I would bypass the control module for now. Connect the Peltier directly to the 12V power supply for 3 seconds. If you can feel the coldness, and the heat on the other side, you know the Peltier is fine(do the same to the pump and fan to test them) and the issue is likely with the control module. May be the wiring or setting.

I would google the model number and see if someone had the same issue or there’s a manual to follow. After trying that if it’s still not working I would need to test with a multimeter to check if there’s current running through the device because based on the description there’s none. Sorry that I can’t be more helpful and hope you get it fixed soon.

Yes I followed your instructions and it worked, after some videos even if it doesnt have the same model. Your video is helpful! I worked on the time delays so it is not defective! 😅 thanks to you!

Thanks for bringing this to my attention. It’s been running ok but I have an unique setup of which the cold water doesn’t directly flow into the tank. To be 100% sure I will take this video down for now. Thanks again.

@@byc0705 Can you share your idea with us? I tried looking for a stainless steel cooling block but had no luck finding one.

@@khaitz You may still use the same device, but to eliminate the concern isolate the cooling water circulation by adding a thin plastic/glass cup in the tank. I will illustrate how in the revised/republished video. Thanks!

@@byc0705 Please do. I this will help a lot of people in the hobby. cheers to you man. looking forward to your improved video.

The new video is published. Thanks!

Yes, I think it will. Make sure you set the temperature or the water may be too cold.

@@byc0705 thanks!!!!

Just want to let you know I made my own water cooler following your video, and it works very very well!!! Full satisfied!!!! You got my like and my subscription!!!

@@alexlama5827 Good to know my video is helpful. Thank you for your support!

The temperature change range heavily depends on the tank size, i.e. the water volume being cooled down. Room temperature also affects the performance.

Ideally, use a heat sink that’s for CPU with 120W+ TDP, which is the power of the thermoelectric chip. Also, be aware that heat sinks may affix differently, e.g. buckled or screwed.

I mean the thermostat.

Sure. Links added in the description. Thanks.

I guess it’s air lock. You may try filling the pump and tube with water. Leave as less air as possible in the system then start pumping. Hope this will solve the problem. Thanks.

It’s CPU water cooling block at 1:55. Thanks.

@@byc0705 Thanks for your answer, I already bought all the components you used, but I saw that you didn't do part 3 of the video that shows how it works :(

@@dark_pizza How it work is demonstrated a little bit at the end of Part 2. Basically just put both ends in the water. One end is the intake and the other outputs the cooled water. I may explain further in Part 3, which thought is mainly about putting the device into another use. Thanks.

@@byc0705 Can I use 2 peltier in the water block cooler? One on top and one on the bottom?

@@dark_pizza sure you can but then you need 2 heatsinks also

Dear i made DIY Aquarium Chiller with 1/3 hp compressor. working best from last 2 years.

12V 10A AC to DC Adapter with Car Cigarette Lighter Socket

Thanks! I use brushless submersible pump, which is often used in small fountain.

Dear i made DIY Aquarium Chiller with 1/3 hp compressor. working best from last 2 years. in version 3 i used silver box which made too much problem due to salts deposited inside box then i use Stainless Steel SS that is best

Yes. By the way, the device can easily transform to a heater by giving the Peltier inverted current, so it can be used in winters.

@@byc0705 thanks a lot!

@@byc0705 what power adapter do you use?

Thank you for being interested in my work. It’s truly an encouragement for me because I’ve never imagined someone would be willing to buy my product. However, my device has not been through rigorous tests under extreme conditions, and therefore may not work in all environments. I would recommend commercial water chiller on the market. Thanks again!

@@byc0705 keep up the good work man.. i enjoy watching the builds!

Based on the test result in my second video it will take about 16 hours to chill 40 gallon down 1 °C (40 gallon x 3.785 liter/gallon ÷ 0.4 ml x 2.5 min. = 946 min.). It will have certain degree of heat suppression but I'm not sure whether it will be enough. You may consider using a stronger Peltier and heatsink, but please be aware that the current limit for the thermostat module is 10A so the temp. auto-control may need to be excluded. There are also commercial water chillers on the market though they are a bit costly.

@@byc0705 thnaks so much

Dear i made DIY Aquarium Chiller with 1/3 hp compressor. working best from last 2 years.

No problem 👍

Dear i made DIY Aquarium Chiller with 1/3 hp compressor. working best from last 2 years. in version 3 i used silver box which made too much problem due to salts deposited inside box then i use Stainless Steel SS that is best. or titanium is best but its too much costly. plz watch it will help you.