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Cooling operation is less obvious - I think the cooler itself runs to a very coarse setting and the heater is used for fine control. In particular, I think you have to set an auxilary control output on the temperature controller to enable the cooler. I have had this working so it's not impossible but may require a bit of fiddling. | Cooling operation is less obvious - I think the cooler itself runs to a very coarse setting and the heater is used for fine control. In particular, I think you have to set an auxilary control output on the temperature controller to enable the cooler. I have had this working so it's not impossible but may require a bit of fiddling. | ||
==Careful== | ==Careful== |