Another PT cruiser owner said they had similar problem and it was the heating core...
Nov 2, 2011 at 7:28 AM
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ASEMASTER6371
✓Experienced Mechanic
52,796 POSTS
that is on the passenger side of the engine compartment with the core being inside the car.
you have a coolant leak dripping on something hot. add coolant till you can get to a shop to have it checked for you. constant overheating can cause engine damage and add tons of money to the repair bill.