Product review (3 stars): Works but range is tilted towards too cold 1C to -15C
Installation was easy enough in a TRUE GDM-49. The range is supposed to be 33F-38F or 0.5C-3.3C. At the warmest setting this unit controls at ~1C and it goes down to -15C from there. I'm using this as a lab fridge and want control of 4C +/- 2C. So, we are going to have to build our own controller with one of those Lerway controllers which are very easy to program for heating/cooling
https://www.amazon.com/gp/product/B008KVCPH2/
and a relay to handle the higher amperage
https://www.amazon.com/gp/product/B004Z0RLL2/