Originally Posted by Soft Ride
Yes sounds like when you rotate from cold to hot the blend door is not closing.
A bit more information: This morning it was again very cold (-26C) and I couldn't get any heat until we had driven with four people in van for 30 mins. At the beginning of our trip, the fan was on with heater in defrost setting, but air was blowing cold thru the lower dash vents. About 30 mins into the trip (and 15 mins after engine hot), the defrost started to work and the air stopped blowing thru the lower dash vents (with same control settings).
If this is an actuator that'* under the dash, I'm surmising that as the cabin begins to warm, the actuator starts to work?? So as a short-term fix to get me thru the next few days until I can get it fixed, I'm thinking I'll use an interior heater to warm the cabin before I start the engine in the morning. Or will that even help?
How hard is it to repair a bad actuator?
Thanks for the help.