My 89 Accord LXi has been acting up lately. The fan motor will turn on for hours, long after the vehicle has been shut off. This in 10 degree weather too. If I turn the key to engage the ignition and shut the power off immediatly, the motor will go off. Sometimes it restarts shortly thereafter sometimes not. I just repl;aced the fan relay in the fusebox and nothing has changed. Any suggestions? thanks Tim