Probably still has air trapped in the system from an improper refill procedure.
It sounds like your cooling is not working when you turn on the a/c system...........
The cooling system in your car (radiator) cycles fluid (water with anifreeze/coolant) through your engine to keep it from overheating. It carries heat away from the engine.
IF IT WAS NOT OVERHEATING BEFORE THE HOSE WAS REPLACED -- MORE THAN LIKELY YOU HAVE AIR POCKETS TRAPPED IN YOUR COOLING SYSTEM
NO!Do not ever put anything into the engine's cooling system that wasn't designed for a car.
Check the coolant level, the cooling system hoses and the radiator, if it's fine you need to check the thermostat.
One of the major causes of a car overheating is a leak in the cooling system. Other causes are a clogged radiator, a bad thermostat, a broken or split hose, a worn out water pump, and a faulty cooling fan.
every 5 years or 100,000 miles you can flush the cooling system , drain the system firset , fill with water , add the flush and let the car run until it reaches normal operating temp ( 180-210) , let the car cool down and then drain the water and the flush liquid out , fill up the radiator with the new coolant , a 50/50 mix , make sure you let all the air out , there should be air breathing points that you can let loose till all air is out
Air not properly purged out of the cooling system, bad electric cooling fan switch(s) in the block, bad connections on the block fan switches.
If there is no cooling system, the engin will overheat.
If you are talking about the low coolant light then it is just low of coolant. If you are talking about the coolant temperature light, then the engine is overheating. This car is 7 years old. Have the cooling system serviced. Drain the coolant and flush the system. Install a new thermostat, and add a 50/50 mix of antifreeze and distilled water.
A car can overheat while using the AC while moving due to several factors, such as a malfunctioning cooling system, low coolant levels, or a failing thermostat. The AC system puts additional load on the engine, which can exacerbate existing cooling issues, especially if the radiator or cooling fan isn't functioning properly. If the cooling system is unable to dissipate heat effectively, the engine temperature can rise, leading to overheating. Regular maintenance of the cooling system is essential to prevent this problem.
Check your owner's manual. The symptoms you describe sound like those that indicate that the "Fail Safe Cooling System" is being activated by high engine temp. Check your coolant level AND make sure the water pump hasn't failed.