I understand now. I may have introduced a problem in this regard with some of the latest updates. It used to be that one could use TM in this way if you removed the temperature threshold values…
If you never want TM to set any modes, for now, do this:
Set the cooling threshold extremely high, at a number you don’t expect to reach like 120F or something. Set the heating threshold extremely low like at 5F or something like that - and leave both modes as enabled.
In your case, as you expect to only use cooling mode you could also use the following setup:
Disable heat mode but leave cool mode enabled.
Give me a bit of time, I will have to look and see if there is a problem in this regard. TM was primarily designed to handle mode changes but I realize there are some people who use it like this so I will take a look and see what I can do.