temp changes from cold to hot on its own on 2000 Plymouth Neon

I can have my panel on heat and it will randomly switch over to a/c and back. Now it is stuck on blowing cold, any suggestions

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
when your car is COLD!!! check the radiator fluid level. You are probably low on coolant. Is your car overheating?