Just wondering if anyone can help me out. I'm having temperature control issues with both of our Dionex ICS-3000 DC units. The first one has a shared compartment with the temperature set to 21° C, it's struggling to get to the set temperature and currently is running at 21.69° C. Our ambient lab temperature is approximately 25°, and I've replaced the lower compartment temperature sensor PCB, the column compartment fan is working ok and the door seals look in good order and seal well. Anybody have any other suggestions? Has anyone had issues with the heat exchangers or maybe the rear fan? (I'm reluctant to open the unit at the back in case I inadvertently do additional damage).

Our second unit has separated compartments, the lower compartment holding a set temperature but the upper zone, while set, is just running at the ambient temperature of the lab.

Any help would be greatly appreciated.
Thanks for your time,