my Honda Civic 10th Generation (2016-2021) AC is blowing warm air

Solution

1. Preparation

• Tools Required: OBD-II scanner, AC manifold gauge set, multimeter, basic hand tools (sockets and wrenches), vacuum pump, refrigerant recovery machine (if necessary).
• Ensure the vehicle is parked on a flat surface and the engine is turned off. Disconnect the battery to prevent any electrical hazards.

2. Recharge the AC System

1. Check Refrigerant Level:
   • Connect the low-pressure side of the AC manifold gauge to the service port.
   • Read the pressure; if it is low, proceed to recharge.
2. Recover Old Refrigerant (if applicable):
   • Use a refrigerant recovery machine to safely recover the existing refrigerant.
3. Vacuum the System:
   • Connect the vacuum pump to the AC system and run it for at least 30 minutes to remove moisture and air.
4. Recharge the System:
   • Disconnect the vacuum pump and connect the refrigerant canister to the manifold gauge.
   • Open the low-pressure side and allow refrigerant to flow into the system until the correct level is reached (as per the manufacturer specifications).

3. Replace Faulty Components

1. Replace AC Compressor (if diagnosed as faulty):
   • Disconnect the electrical connector and remove mounting bolts of the compressor.
   • Remove the old compressor and install the new one, tightening bolts to the manufacturer’s torque specifications.
   • Reconnect the electrical connector.
2. Replace Cabin Air Filter (if necessary):
   • Remove the glove compartment to access the filter housing.
   • Slide out the old cabin air filter and replace it with a new one.