Ac not cooling properly

It is not the best but can be done.
Don't remove the whole thermostat only the center part and fit the frame back in the housing.
If you remove the whole thermostat you can end up with cavitation problems and this can cause hot spots in the engine.

How is the engine temp? Thermostat may be stuck open or inlet heater hose may be restricted.

first I would have someone recover the R134a from the system then add dye and recharge to the correct level R134a and check vent temp levels this system would work half way normal if R134a is low by .4 oz's but would take a long time to cool the car down

160 is not high-thats below warmup temp--the fan sensor has issues etc Vehicle is not gettin to operation temp so hav it diagnosed for free at a parts place-fan motor may be goin bad

If you have proper amount of freon in sytem, try blowing out condensor and radiator fins with air and water, make sure your cooling fan functions properly. After all this, you can try replacing the expansion valve. Ultimately, you may just have a weak compressor. Another thing to note is make sure you do not have too much freon or oil in the sytem.

Does this have auto temp control where you set the temp number or does it have a knob you set 1-5. I'll bet you have auto temp. and you need to replace the blower control module under the hood.

indicates gas pressure and condenser cooling problems
check the condenser fan is working properly and have the gas pressures checked by gauges
check that the evaporator fins are clean and not blocked as ice build up will cause the same indications

Would have him check out side air temp sensor ,thermister and rerove control head and inspect for burned terminal.1st.

try running it to running temp and try to check the heater core hoses. if one is hotter then other may have pluged up heater core.

have it checked at an auto supply store for free. it could be the coolant temp. sensor.