I just got back from driving from Montana to KC over the weekend. My wifes 02 H6 (40K miles) sedan did fine from MT until about ten miles outside of Sioux City, the temperature kept going up and down between the red and the 3/4 mark. I pulled over and checked everything out. Overflow tank was at full and I didnt see any noticeable leeks coming from the radiator or the block. We limped home and I started to investigate the cause. I got the car back up to temperature and checked to see if both fans were spinning, it looks like only the passenger side fan is going even when the car was almost in the red. I looked under the fuse panel relay to check if the fuse was blown but they were both fine for main fan and the sub fan. My question is that I also noticed that there is no relay in the sub fan 1 spot, is there supposed to be one there? Is this a common thermostat,relay,fuse problem that can easily be fixed or do I need to take it in to subaru. Any help would be greatly appreciated.
Tks in advance, H3