Temperature Control Unit

The temperature control unit referes to the maintenance of passenger compartment temperature and humidity at a present level, regardless of the outside weather conditions. Therefore, the temperature controls also holds the relative humidity in the compartment at a suitable level and prevents window fogging. Many temperature control systems incorporate self-diagnostic test provisions where an on-board microprocessor controlled subsystem displays a code. This code indicates the cause of malfunction. Temperature control unit has a control panel inside the instrument panel to give access to both the driver and in-passenger to operate the air-conditioning and heating system. Other components of the temperature control unit are – programmer, power module, Clutch diode, High-side temperature switch, low-side temperature switch, high-pressure switch, low-pressure switch, pressure cycling switch, sun-load sensor, Outside temperature sensor, in-car temperature sensor, aspirator, coolant temperature sensor, Vehicle speed sensor, throttle position sensor, heat turn-on switch, brake booster vacuum switch, power steering cut-off switch, mode actuators, water valve actuators.