I did a test when I first got mine with just water and the coldest I could get the fermenter was 36F with the glycol at 26F. It wasn't because the chiller couldn't handle it, but because there was ice forming on the coils inside the fermenter and reducing the heat transfer. Probably be able to get colder with beer than just water with the lower freezing temperature.
That being said I don't know if your gaining anything by trying to crash at 32F than at 36F.
That being said I don't know if your gaining anything by trying to crash at 32F than at 36F.