Left vent after idling for 10 minutes with the puller fan activated with HP Tuners. Still need to program parameters to make it come on as an auxiliary as well as stay on for a few minutes after the engine shuts down. I was reassemling the dash after putting the cluster back in. I replaced burned out bulbs in the cluster with red LEDs that are both brighter than the OEM bulbs and do not mess with your night vision as you scan the gauges.