Chrysler PT Cruiser Forum : “Rear hatch unlocks intermitedly and dash indicator light comes on”

Rear hatch unlocks intermitedly and dash indicator light comes on

I have a 05 PT Cruiser Touring - The rear hatch keeps intermitedly unlocking on its own (dash indicator lock comes on) and when I walk around to look at the door - it's open - sometimes I can open it with the micro-switch but sometimes I have to use the key .... don't understand... does anybody have an answer?

Thanks!