Cold air entering passenger side of cab
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That would be my guess too. The door is probably lying on the fan, and is probably blocking your fan airflow. Since you now have an opening from the outside to inside, you'll be getting a draft. You have four choices..
1. Go to Heater Treater and get a repair kit, I think it's under $200 and a relatively easy fix.
2. Bring it to a dealership, the estimate I got was well over $800.
3. Block off the outside air grill to prevent any air from outside entering. This is what I did, takes about a 1/2 hour and some bloody knuckles.
4. Leave it alone.
1. Go to Heater Treater and get a repair kit, I think it's under $200 and a relatively easy fix.
2. Bring it to a dealership, the estimate I got was well over $800.
3. Block off the outside air grill to prevent any air from outside entering. This is what I did, takes about a 1/2 hour and some bloody knuckles.
4. Leave it alone.