In my dodge nitro 08 the ac is not shooting out cold air . I put a gage to it & read 154 psi not sure what it could be

If both the coolant hoses are hot then the coolant is passing through the heater core. You probably have an actuator or blend door that is not working. It may be restricted by commanding it to work. A scanner could help you find out the problem.

NOTE: LHD model shown. RHD model similar. All vehicles are equipped with a common heater, ventilation and air conditioning (HVAC) housing assembly (1). The heating-A/C system combines A/C, heating, and ventilating capabilities in a single HVAC housing mounted within the passenger compartment behind the instrument panel. The HVAC housing assembly includes:

1. Mode-air doors (2)
2. A/C evaporator (3)
3. Recirculation door actuator (4)
4. Air inlet housing (5)
5. Recirculation-air door (6)
6. Blower motor (7)
7. Blower motor resistor (8)
8. Heater core (9)
9. Air distribution housing (10)
10. Blend-air door (11)
11. Blend door actuator (12
12. Floor distribution ducts (13)
13. Mode door actuator (14)

If core was blocked by leaves, etc, I suppose this might be possible, but more likely there is a flapper door not working correctly, due to vacuum leak or bad actuator.

not sure where the fuse is for sure either under hood or drivers side under dash,but if the refrigerant gets low as it will over time or if theres a leak the ac clutch will not kick in. even with heat on defrost the ac clutch should kick in and out if ts working proper

The lite blue orange wire grounds the ac clutch relay. The engine computer is supposed to do this IF conditions are right for the ac to function. There could be a problem with one of the freon pressure sensors or the AC control module. If you are not getting a normal level of cold air from the vents, and the mechanical system is functioning correctly, the problem may be the ac control module. There may be blend doors that are not open or closed as they should be.
This is normally beyond most DIY people, so info is not available in over the counter repair books. A shop that knows how to work on electronic ac systems and a shop manual may be needed.

The AC compressor may need recharged, or repaired / replaced. A lot of times what happens is through the winter AC units aren't ran so the seals recieve no oil and dry out letting coolant escape. Sometimes you can get lucky and a recharge (which contains oil essential for your seals) will do it - if they are too dry however, you will need a new compressor. You can have your AC unit recharged at nearly any dealership except in the state of California. Hope this helps.

I have the same problem. The can of freon I bought said the gage should read 45-55 psi with compressor running and ambient temp of 80 degrees. In any case 25 psi is too low for AC to function.

The compressor is shot.

Did anyone find the answer for this?

Rick, u will need to take your car to get serviced. If your ac is not working properly it might be something inside that needs to be looked at. You might need to replace your heater box.