Temperature gauge back and forth between normal

check your heater core and your thermostat. your thermostat first.

check coolant level could be too low allowing air in the cooling system causing air pocket in engine around the engine coolant sensor.coolant sensor needs to be in hot coolant so it will cause the cooling fan to come on at a set temperature.make sure coolant correct level and the coolant level in the cooling overflow jug should be at full cold mark.the cooling overflow jug should never be empty,if you see empty cooling overflow jug air got in the cooling system so make sure when engine cold every time raise hood make sure cooling overflow jug coolant level at full cold mark.if jug stay empty you have cooling leak.so replace radiator cap,if coolant level all good,i would replace the engine coolant temperature and thermostat.when your car come to a long stop or driving along long line of slow moving traffic the engine coolant blower motor should running if not have vechicle code scan for faulty coolant fan motor control module.or ecm problems.

Low oil no. Low water yes simply check the water. I don't think the temperature sensor is bad. The problem is probably due to the car running hotter.

hi it could be your coolant level has dropped to far for the sensor to operate the fan to work ,so top up the coolant by removing the coolant cap and topping it up and run the engine with the cap off and the heater switched to hot but with the fan switched off till it has warmed up and all the air is expelled from the system if that doesnt help you need to locate the coolant temperature sensor and replace it good luck

sounds like it has a coolant leak, better take it to a qualified shop asap.

This is a likely "fail safe". Have your coolant temperature sensor tested. If the temp sensor is faulty, it could keep the fans on as a safety so the engine does not overheat.

hi it sounds like the engines electric cooling fan has automatically come on as the engine has got hot enough for it to be cooled down
you may have never noticed it before .
check your coolant level and your oil level to be on the safe side and keep an eye on the temperature gauge the fan should come on when the gauge goes past normal running teperature if its coming on a lot there may be a problem but its probably working as normal

Bad head gasket or cracked head

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If you have a new thermostat, then your temp sensor is faulty. If sensor is new, then it is the wiring to sensor or problem with the ECM

check your oil and coolant level to be on the safe side but it sounds like everything is normal if there is no airflow across the radiator the fan will operate when the engine gets hot even with the engine off