I pulled it out and pulled it apart to see if anything looked out of place. I noticed that on the left hand side there is a water box with 3 pipes going into it. The middle of the 3 was coming off. After reinstalling it and adding a clip to make sure is did not come off again, I've had no more issues.
I can only assume that air was leaking in and triggering a sensor.
Cliff March 2009 |