My a/c does not cool. All controls set properly and only get hot air. They say all is proper, but it gets above 90 and we boil inside the car

You might have a faulty water valve. The hot air in the car is supplied by the engine cooling system. As the engine works, it heats up and water is circulated through the system and kept at a cooling level by the radiator. However, this water is still hot, and by turning on the heat in the car, a valve is opened that allows the hot water to circulate through the heater core inside the car.
This core is in fact just a mini radiator, and air from the blower fan inside the car blows air through this mini radiator, thus supplying hot air in the car.
If you don't want hot air in the car, the heater control operates a valve that shuts off the hot water from the engine. If this valve is faulty, it will allow hot water to circulate through the system. Another possibility is that the cable operating the water valve might be maladjusted or the cable or the lever operating the cable is broken or faulty. It often happens that the outer part of the cables slip and the controls operate so-so but never well.
If the cables to the dashboard controls are not adjusted properly or have started slipping, it could also cause the fresh air vent to not close properly, and this will cause a flow of air even when the controls and the fan are turned to the off position.
You can remove the control panel from the dash and check the cables and controls, but it is a finicky job. Maybe you want to take the car to a mechanic?

As long as your not overheating and fans working properly, hard /firm hoses are normal. Cooling system builds pressure when hot, like a pressure cooker. The radiator cap maintains that pressure along with proper coolant mix to prevent boiling.

when there\'s air in the cooling system it can give a super hot reading because there;s no coolant where the temp sensor is located-when coolant passes over this super heated area it will boil -thus causing the boil over effect-with no coolant in the heater core it will not heat either-try adding coolant -run a little till it gets hot then shut off-make sure there\'x coolant in the over flow bottle as it cools back down it will suck coolant back into the system-don\'t let it run out or it will suck air back in-it will take a few heat and cooling cycles to get the air out. at the shop I work at we use a tool to suck all the air out of the system and then open a valve and the vacume draws the antifreeze back into the system. If you can\'t get the system to take antifreeze you may have a leaking head gasket that is pressurizing the system and blowing out the antifreeze-this could be diagnosed by a mechanic-cheers Denny

no not normal, is it getting hot on the temp gauge using water?

push the A/C button to shut it off.

hi Planeman.
Why is the heater in my car not working? Ken Mattson, owner of Len's Automotive in Bellevue, Wash., says a car heater can stop working for a number of reasons, including: A low antifreeze/water level in the radiator due to a leak in the cooling system. A bad thermostat that isn't allowing the engine to properly warm up.11 Dec 2013

Why Isn't My Car Heater Working? ' Angie's List

https://www.angieslist.com/articles/why-isnt-my-car-heater-working.htm Search for: Why is the heater in my car not working?
Why is my car heater not blowing hot air?Hot coolant from the engine passes through a heater core, which looks and functions a lot like a small radiator, and a blower motor forces air through it. ... It's also the reason that a plugged heater core, stuck thermostat, or air in the cooling system can all cause a car's heater to blow cold.9 Jul 2017When Your Car Heater Blows Cold Air - Lifewirehttps://www.lifewire.com/when-your-heater-blows-cold-air-534667
How do you fix the heat in your car?Begin with the vehicle on level ground, engine off (cold) in park with the emergency brake set.Heater Controls. Step 1 - A heater cannot operate unless the engine is full of coolant/antifreeze. ...Refilling Cooling System. ...Engine Thermostat. ...Blend Door Actuator. ...Broken Vacuum Line. ...Heater Control Valve. ...Vacuum Gauge. ...Heater Core.How to Fix a Car Heater in Under 30 Minutes - 2CarPros
What are the symptoms of a bad thermostat?A motor with a bad thermostat will run fine for the first few minutes, then overheatrapidly. Other symptoms include the engine and radiator making a rumbling, gurgling, boiling sound: like a steam pipe knock, if you've ever heard one of those. A thermostat sticking open can make your heater not work in the winter.Auto, Car, Truck THERMOSTAT Repair bad thermostat symptoms
or go to this link if you need more help.
2008 ford ranger has heater that won get hot Google Search

there is a flap inside the venting that directs the air. This vent can get stuck. It is controlled by a vacuum controlled actuator. It can be leaky or a hose is disconnected

Check the following :

BMW Code PO128
This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125
In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant

temperature (ECT) sensor reading, and the speed of the vehicle.

You will likely not notice any drivability problems other than the MIL illumination.
A code P0128 may mean that one or more of the following has happened:

• Low engine coolant level
• Leaking or stuck open thermostat
• Faulty cooling fan (running too much)
• Faulty coolant temperature (ECT) sensor
• Faulty intake air temperature (IAT) sensor

solutions
Past experience indicates that the most likely solution is to replace the thermostat. Verify coolant strength & level

• Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
• Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
• Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
• If the above items check out good, replace the thermostat

The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

On my 90 Aerostar 3L, I had a similar problem, in that the front vent control, or blend door was not setup correctly and had to be adjusted. Somehow the choke type cable for temperature adjust, had slipped out of its holder at the door end, and was not allowing the blend door to close properly, and the outside air was not allowed to bypass the interior heater core, even thought the cooling core was lowering the air temp, but raising it again because it had to go through the heater core. Removing the top of the dash, and looking in from outside the windshield, and having someone operate the temp control will tell you if it's working properly, or needs adjustment. Alternately, if it's the manual control type, by quickly operating the temp control, you should here the blend door "thump" as you open and close it. There should be full travel in the control range, or if limited, the above problem applies, adjust at the blend door mechanism.