What is wrong the temp does not get hot going down rasd
I would buy a new thermostat and flush the radiator coolant. Dexcool (The orange coolant) is known to clog up the internals including the temperature sensor in cars of your age.
While you are at it, I would strongly consider changing radiator hoses and clamps unless that was done recently.
If you are referring to the dashboard temperature gauge not moving...It means that your temperature sending unit may be faulty (or it's not plugged in). Dexcool is known to clog up the internals including the temperature sensor in cars of your age. Inspect the connector to the temp gauge for damage and replace the temp gauge.
A replacement temp sensor is about $15 at any auto parts store.