So both fans are working even when it is overheatings? This is very important to check. Make sure both fans are coming on when it is overheating. IF only one of them is one, check to see if that fan shuts off when you switch the a/c to the off posistion. YOur a/c fan might be working but not the engine fan.
ALSO have you had your thermostat checked to see if it is working. It might be having problems all the way when the engine is hot.
Get it to a dealer and get it checked out
Cosmo. Friendly Mazda tech
Friday, January 6th, 2006 AT 6:27 AM