Medical fluid temperature control

A peritoneal dialysis machine comprising:

• a console including a compartment configured to releasably receive a dialysis fluid cassette, the console including one or more thermoelectric modules arranged to be adjacent the cassette while the cassette is received by the compartment and to effectuate energy transfer with a dialysis fluid in a fluid flow path of the cassette that is adjacent the one or more thermoelectric modules;
• a fluid temperature sensor arranged adjacent to the cassette while the cassette is received by the compartment, the fluid temperature sensor arranged near where the dialysis fluid exits the cassette to enter a patient line extending from the cassette and arranged to detect a temperature of the dialysis fluid after being affected by the one or more thermoelectric modules;
• one or more processors coupled to the console and configured to control the one or more thermoelectric modules based on the temperature of the dialysis fluid detected by the fluid temperature sensor such that:
• (i) during a heating mode the one or more thermoelectric modules heat the dialysis fluid in the fluid flow path of the cassette and (ii) during a cooling mode the one or more thermoelectric modules cool the dialysis fluid in the fluid flow path of the cassette;
• and
• an ambient temperature sensor arranged to detect an ambient temperature around the console,
• wherein the one or more processors are configured to determine, based on the ambient temperature detected by the ambient temperature sensor, a target temperature for the dialysis fluid as measured by the fluid temperature sensor, and
• wherein the target temperature is determined based on an anticipated change in the temperature of the dialysis fluid as the dialysis fluid flows from the peritoneal dialysis machine through the patient line to a patient receiving treatment from the peritoneal dialysis machine.