The Great Conflict

Traveling east and then south you are able to reach the coolant system without a second to spare. Flames cover several machines in the area and steam from broken pines and lines makes visibility very difficult. Stumbling around you are able to find the control panel attached to glass casing over a massive vat of coolant. You can see the light blue liquid bubbling inside the vat as it is beginning to reach a boil. You take a look at the control panel and see three main factors that can be altered. You may modify the heat, pressure and pH of the coolant. You immediately turn the heat knob down to stop it from boiling but a message pops up on the display panel. It reads, "Error, heat function has been disabled by severe internal damage. Contact maintenance immediately." It seems that without the temperature function you are limited to modify pressure and or pH of the coolant. You only have one shot at this, so don't mess it up. How will you modify the coolant to stop it from boiling?