I have a honda civic 1999 my problem is the temperature gauge staying in cold specially when its cold but when its not cold it stays on middle but I notice when my heater is on it take to long to move in the middle or sometimes if its already in the middle it is going down to cold.I already replace the thermostat,temp sending sensor and water temp sensor. And I check the fan I direct it to the battery and it run hope you can suggest something