2008 Honda Ridgeline- engine fan keeps running (30 min or more) after engine is shut off- causes battery to go dead.
WHAT ARE CAUSES OF ENGINE FAN RUN ON? on 2008 Honda Ridgeline
Have your temp sensor tested or circuit diagnosed; If the computer still recognizes the coolant is still hot it will run till it cools.
Check(or have checked) the COOLING fan relay (not the A/C condensor fan relay)most likely bad. Same type relay as A/C compressor clutch , and they have lots of problems with those.
could be fan relay is bad or poss coolant level is low