why does my Ram 1500 DT (2019-Present) have ice buildup in the AC vent?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery for safety.

2. Replace Cabin Air Filter

• Sub-steps:

  1. Locate the cabin air filter access panel, usually under the dashboard or behind the glove compartment.
  2. Remove the screws or clips holding the panel in place.
  3. Take out the old cabin air filter and inspect for dirt or blockages.
  4. Insert a new cabin air filter (ensure it is the correct size and type).
  5. Reinstall the access panel and secure it with screws or clips.

• Tools Required: Screwdriver, new cabin air filter.

3. Check and Recharge Refrigerant

• Sub-steps:

  1. Connect the manifold gauge set to the low-pressure and high-pressure service ports of the AC system.
  2. Start the engine and turn on the AC to the maximum setting.
  3. Read the pressure gauges; compare them to manufacturer specifications.
  4. If low, add the appropriate refrigerant until the correct level is reached.
  5. Disconnect the gauges and securely replace the service port caps.

• Tools Required: Manifold gauge set, refrigerant (R-1234yf).

4. Inspect Evaporator and Ducts

• Sub-steps:

  1. Remove the dashboard or panel covering the evaporator if needed for access.
  2. Check for ice buildup on the evaporator; if present, allow it to thaw completely.
  3. Inspect the AC ducts for blockages or debris that could hinder airflow.
  4. Clean any obstructions found in the ducts.

• Tools Required: Socket set, cleaning brush.

5. Test Blower Motor

• Sub-steps:

  1. Access the blower motor, typically located behind the dashboard.
  2. Disconnect the electrical connector and use a multimeter to test for voltage.
  3. If no voltage is present, trace back to the fuse box and check for blown fuses.
  4. If the blower motor is faulty, replace it with a new one.

• Tools Required: Multimeter, replacement blower motor.