The air conditioning system will only blow cold air. Regardless of the mode, I can only get cold air. Can you give me an idea on how to fix the problem? Thanks Don 615-653-3834 [email protected]

bad blend or mode damper door motor actuators. is cause (maybe)
we know how to move them by hand motors off (actuators)
hot all the time is blend unless AC compressor is dead.
yes blend doors can jam fully to hot, sure can.,
It needs service, there are other causes.
most of the tests you can not do. or easy.
there are 2 systems here.

• the blower distributor system. (dampers 3 or more0
• or
• the AC R134 loop dead or weak.

what I do is make sure the compressor runs
and if does,
move the blend door by hand (my jeep has built in self test of this)
and by hand I put the damper to evap core only mode and if no cold air now, the loop is bad and I stop here, lots more tests from hear.

or he AC condensate drain is clogged even covering up deeply evap core . blocking is air flow., and super common this and a simple fix.

If you mean the vents on the dashboard that are supposed to blow cold air if the air conditioning is on, and hot air if the heater is on, then here is a part answer, just for this problem I described.
No cold air could mean there is no gas in the air conditioning system.
The gas is called "freon" in the US, however we no longer use "freon" itself because of environmental poloution. We now use a substitute whose number is 134a.
There could also be some part failure preventing the air conditioning system from activating.
Some parts that fail could be the condenser, the evaporator, the receiver/dryer, one of the hoses or pipes, and the compressor.
A technician should be able to check all this out and give you a good answer.
God bless your efforts.

most likely a stuck heater tap,but may involve vacum or elec controlled trap doors in HVAC system

I have same problem,add some gas,buy the kit one can could be with seal,works for me.

My guess is that one of the hose's has a leak and needs to be replaced. A mechanic can run some tests to check if that's the case. Best of luck.

The first thing to do would be go to your local auto parts store and buy an air conditioning recharge kit. Provided your vehicle isn't too old, they sell recharge kits that require no tools.

If their is a leak anywhere while you recharge, you will know.

Try recharging the air conditioning first, it is very simple and the kits come with simple instructions.

If there are no leaks, your A\C will blow cold air again. As for the pressure, if it continues to slightly blow air you may be looking at a new air compressor unit or a vaccum line. A new unit will run you anywhere from $200-$2000 dollars plus labor depending on the vehicle.

If the recharge works, at least you will have slightly blowing cold air rather than hot and you can continue that way until the unit fails.

Do you mean it takes a while to blow air or cold air? I am going to assume you mean cold air. Sometimes it can take a few seconds for the refrigerant to get up to speed. Especially when real hot outside. If the air is not getting cold for a long time you may have a leak. Refrigerant systems are sealed and in theory, with no leak, will always blow cold. Before you charge the coolant in your system fix the leak first or you are wasting your money. If this does not answer your question please be a bit more specific. Good luck.

the vent hose behind the dash slipped off of the plastic housing.

This is just an idea, but if the a/c is working good, it may be the relay that changes your heater from hot to cold....give it a shot..just an idea....Please leave a good ratin, it is very important to me...

It could be a number of things...it may be low on freon...the drier/filter may need replaced...could have a bad expansion valve... regardless it should probably go to a qualified shop to be checked out...