I have an '89 Formula 305 with dual electric fans. The fans have recently been coming on at various times they shouldn't. For example when I start it in the morning they kick on and when it is running at normal temp they will kick on. They will turn off so they aren't stuck on all of the time. Could it be a bad temp sensor? This is with the AC off.

 

You could have a failing sensor, or an intermittent connection at a sensor. That would include the A/C pressure switch along the right subframe rail.