This temperature controller is great. I like the ease of use and customization. I know some have complained that the instructions aren't that good and easy to understand, but they were very easy to set up and it all took about 10 seconds. I will try to give step by step and show how easy it is.1. Connect controller.2. While holding down the "Install" button, go to Setup.3. I like reading F instead of C, so hit the install button 7 times and switch to F if you want. I like to do that first so all other settings are also in F for programming. For me it makes it easier. Once you switch to F, make sure you hold the set button again to save.4. Press and hold the Set button again for three seconds. The first setting is the desired temperature.5. Press again (do not hold) and "HD" will appear. That's the heat difference. Set the desired parameter.6. Press again (do not hold) and "CD" will appear. It's a cooling differential. Set the desired parameter7. Press again (do not hold) and "AHโ will be displayed. This is when you want the alarm to go off at a certain high temperature. Set the desired parameter8. Press again (do not hold) and "ALโ will be displayed. This is for the low alarm if you want the alarm to go off at a specific low temperature. Set the desired parameter.9. Press again (do not hold) and "PTโ will appear on the display. This is what you want to set the compressor delay for. Set the desired option. 10. Press (do not hold), adjust again and "CAโ will be displayed. You only need to set this if the temperature needs to be calibrated. Set the desired option. 11. You have already made the last setting in step 3. Just hold down the Set button until it stops blinking. Now it is set. I am very impressed with its packaging. I use it for my shrimp tank where I need to be able to control the temperature. It does exactly that and I couldn't be happier. I will add additional photos of the setup with the shrimp tank.
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