Originally Posted by
DRUMMY
Check out small electric pump near front o/s headlight on uk cars. It is used for circulating hot water for heater blowers when engine turned off.by holding the water pipe going to heater in that area you may feel vibration of pump running.hope it helps.
That is called the 'REST' system, if that is on, you should see a red light on in the button on the heater / AC control panel.
However, I do believe that this resets to off with each cycle of ignition on / off.