2007 pontiac g6 3.5 temp gauge and air conditioner stopped at same time

Could be for the air con but not temp gauge . Having it checked for DTC's diagnostic trouble code's is first thing that should be done . Don't know how much you know about the electronic's on your vehicle , Control modules , serial data communication networks an the like . An 07 G6 , Pontiac ? The Temp. gauge gets it's info from the engine computer (PCM) via GMLAN serial data bus . Plus when you push the A/C button , this is an input to the BCM - body control module ,which sends a message on the data bus to the PCM - engine computer , which in turn will energize the compressor clutch relay ,turning on the A/C .So you see the complexity of the vehicle . GM has had problems with step motors in the instrument clusters . These step motors are what control the needles in the gauges . That doesn't mean run out an buy a new instrument cluster . Your best bet is take it to a GM dealer , Chevy , Cadillac , Buick . They have a factory scan tool that can simplyfi diagnoses rather then just replacing parts .

You might have an air pocket trapped in upper radiator hose. If the coolant was low, refill and open bleeder screw to let air out.

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Check the blower motor and blower resistor.

check for a bad earth in the system . Possibly the earth strap on the motor or dirty battery terminals . IF the temp gauge will not work (bad earth ) and the ac stops working ( cabin air temp reaches setting) or the circuit has an earth problem switching off the ac. Check all wires for broken , not connected properly and check each earth point for clean and tight.

If the engine temp exceeds the limit the computer can kill the ac. If the cooling fan stops working the engine temp can go up and also stop the ac from being cold.
Do you know if the cooling fan is working when the problems happen ?

if it cuts off again i have found a bunch of air temp sensors go bad in front of the raid and a/c condenser they also damaged the connector

Usually if its "fast cycling" its low on freon which means you probably have a leak also. After adding the freon to the proper level the fast cycling should stop and you should have cold air in the low 50 degree range coming rom the vents. You can buy the cans of freon with the pressure gauges built into them so you can gauge how much to put in. It's based on outside air temperature. Follow the instructions carefully and you shouldn't have any issues.

jtg

You may have a relay, and thermostat and or computer issue. You need to get it diagnosed properly. Also make sure the wire did not fall of the Temp sensor.

Three possibilities;
All related to blown fuses,

1- Fuse blown in the engine compartment LH.
2- Fuse blown in the cabin forward LH below the dashboard (below your legs left hand).
3- Fuse blown in the harness (wire bundles) below the dashboard very easy to reach with your hands “just look underneath steering wheel ".

U said " The air conditioner blows, but the air is not cold.
" Yes only the fan working which might receiving power independent all from those other mentioned things.
If all fuses OK. Then look for broken wires.

Regards;
MAR