A fuel cell system comprising: a fuel cell assembly having an anode inlet, a cathode inlet, an anode exhaust, and a cathode exhaust; a coolant storage module configured to provide coolant to the fuel cell assembly; a thermal module configured to be fluidly connected to the fuel cell assembly and the coolant storage module, the thermal module comprising a condenser and a separator; wherein the fuel cell system is configured to generate an expansion exhaust stream by combining at least a portion of one or more of the cathode exhaust exiting the fuel cell assembly, the anode exhaust exiting the fuel cell assembly, an anode gas purge stream, the anode exhaust stream exiting the thermal module separator, and the fluid flow exiting the thermal module condenser; the fuel cell system further comprising: an expansion turbine configured to receive the expansion exhaust stream; one or more fans arranged to cool the thermal module condenser; characterized in that the fuel cell system further comprises controller configured to operate the fuel cell system in a temperature-boost mode, wherein in the temperature-boost mode the controller is configured to control the one or more fans and reduce a set point on the one or more of fans below a predetermined threshold level to increase the exit temperature of a fluid flow from the condenser; wherein the controller is further configured to operate the fuel cell system in the temperature-boost mode for a predetermined period of time less than or equal to a first predetermined operational time limit when the amount of coolant in the coolant storage module is less than a first threshold amount. a fuel cell assembly having an anode inlet, a cathode inlet, an anode exhaust, and a cathode exhaust; a coolant storage module configured to provide coolant to the fuel cell assembly; a thermal module configured to be fluidly connected to the fuel cell assembly and the coolant storage module, the thermal module comprising a condenser and a separator; wherein the fuel cell system is configured to generate an expansion exhaust stream by combining at least a portion of one or more of the cathode exhaust exiting the fuel cell assembly, the anode exhaust exiting the fuel cell assembly, an anode gas purge stream, the anode exhaust stream exiting the thermal module separator, and the fluid flow exiting the thermal module condenser; the fuel cell system further comprising: an expansion turbine configured to receive the expansion exhaust stream; one or more fans arranged to cool the thermal module condenser; characterized in that the fuel cell system further comprises controller configured to operate the fuel cell system in a temperature-boost mode, wherein in the temperature-boost mode the controller is configured to control the one or more fans and reduce a set point on the one or more of fans below a predetermined threshold level to increase the exit temperature of a fluid flow from the condenser; an expansion turbine configured to receive the expansion exhaust stream; one or more fans arranged to cool the thermal module condenser; characterized in that the fuel cell system further comprises controller configured to operate the fuel cell system in a temperature-boost mode, wherein in the temperature-boost mode the controller is configured to control the one or more fans and reduce a set point on the one or more of fans below a predetermined threshold level to increase the exit temperature of a fluid flow from the condenser; wherein the controller is further configured to operate the fuel cell system in the temperature-boost mode for a predetermined period of time less than or equal to a first predetermined operational time limit when the amount of coolant in the coolant storage module is less than a first threshold amount.