why does my Honda Pilot YF3 (2016-2022) AC only blow warm air?

Solution

1. Preparation

• Tools Required: Safety glasses, gloves, OBD-II scanner, manifold gauge set, leak detection dye, basic hand tools.
• Safety Warnings: Disconnect the battery before working on electrical components. Allow the AC system to depressurize before handling refrigerant.

2. Check and Recharge Refrigerant

• Sub-steps:
  1. Attach the manifold gauges to the low and high-pressure service ports of the AC system.
  2. Check the pressure readings against manufacturer specifications.
  3. If low, add refrigerant (R-1234yf) slowly until proper levels are reached (typically 40-50 PSI on low side, 200-250 PSI on high side).
  4. Monitor for any bubbling or hissing noise indicating leaks.

3. Inspect and Replace Components

• Sub-steps:
  1. If leaks are found, use leak detection dye to pinpoint the source.
  2. Replace any damaged hoses, seals, or the AC compressor as needed.
  3. Ensure all connections are tight and secure after replacements.
  4. If the cabin air filter is clogged, remove the old filter and install a new one.

4. Test AC System

• Sub-steps:
  1. Reconnect the battery.
  2. Start the engine and turn on the AC to the maximum setting.
  3. Observe the AC compressor operation; ensure the clutch engages.
  4. Check the temperature of the air coming from the vents; it should be significantly cooler.