OK so I've been searching around for a few weeks and figured I would ask to see if anyone else has this issue.... I have a 95 4runner v6 auto... When I turn on the fan for the heat/ac my coolant temp indicator pegs out to full cold... Turn the fan off and it goes to the true coolant temp. Now it's not a big deal it's just getting annoying since it's getting cold and I am using the heat more often. Any ideas?

 

Mine does almost the same thing. Mine drops to the cold side when the fan is on. Fan off it reads the correct temp.
Edit. Just reread it. Mine does the same thing.

 

Bump..... No ideas?

 

Did u ever figure out what was causing this?



QUOTE=Wardog;52235535]OK so I've been searching around for a few weeks and figured I would ask to see if anyone else has this issue.... I have a 95 4runner v6 auto... When I turn on the fan for the heat/ac my coolant temp indicator pegs out to full cold... Turn the fan off and it goes to the true coolant temp. Now it's not a big deal it's just getting annoying since it's getting cold and I am using the heat more often. Any ideas?[/QUOTE]

 

Welcome to YotaTech, Ashleyhines. Wardog hasn't made a post here in 7 years. Maybe she's still listening? I don't know.

Good luck.