why does my Ram 1500 DT (2019-Present) AC blow warm air

Solution

1. Preparation

• Tools Required: OBD-II scanner, refrigerant gauge, multimeter, basic hand tools (screwdrivers, sockets).
• Ensure the vehicle is parked on a flat surface and the engine is off. Disconnect the battery negative terminal for safety.

2. Refill Refrigerant

• Sub-steps:
  1. Connect the refrigerant gauge to the low-pressure port of the AC system.
  2. If the pressure is low, add the appropriate type of refrigerant (R-1234yf or R-134a as per the vehicle’s specifications) slowly until reaching the recommended pressure (typically 30-40 PSI at idle).
  3. Monitor the system while adding refrigerant to avoid overcharging.

3. Replace AC Compressor (if necessary)

• Sub-steps:
  1. Remove the serpentine belt by releasing the tension with a wrench.
  2. Disconnect electrical connectors and refrigerant lines from the AC compressor.
  3. Remove bolts securing the compressor to the engine block using a socket set.
  4. Install the new compressor by reversing the removal steps, ensuring all connections are secure.
  5. Recharge the AC system with refrigerant as in step 2.

4. Check and Replace AC Clutch Relay (if necessary)

• Sub-steps:
  1. Locate the AC clutch relay in the fuse box.
  2. Remove the relay and test it with a multimeter for continuity.
  3. If faulty, replace it with a new relay.
  4. Reinstall the relay and check for proper operation.