Subaru 2001 Legacy Owner's Manual page 184

B Temperature sensors
This Automatic Climate Control system employs the several sensors.
These are very delicate parts. Therefore, if these sensors are dam-
aged, it is possible that the Automatic Climate Control system will not
properly control the air temperature in the passenger compartment.
To prevent possible damage to the sensors, please observe the fol-
lowing:
– Do not allow anything to impact the sensors.
– Be careful not to let water contact the sensors.
– Do not cover the sensors.
The sensors are found at the following locations:
– Sun-load sensor (beside the windshield defroster grille)
– In-vehicle temperature sensor (beside the temperature control
dial.)
– Ambient sensor (at the backside of the front grille)
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HB5024BB HB5025BB