If both are good, swap the AC compressor clutch relay. If you don’t see battery voltage, check fuses 22 and 25 in the underhood fuse box. Remember: The blower motor must be running for this to happen.Ĭheck for power to the AC compressor clutchĭisconnect the connector at the AC compressor and test for battery voltage with the engine running, AC ON and blower ON. If the HVAC head sees a return voltage, it sends a digital signal to the PCM to provide power to the AC compressor clutch relay.
If you don’t see that, check for an open between the HVAC control head and the thermal protector connector. The HVAC head provides a 12volt reference on the blue/white wire and looks for a return on the red/white wire. If the thermal protector shows continuity, check for power and ground to the thermal protector connector. To test, disconnect the connector and test the thermal protector using a continuity feature on your meter. When the compressor overheats the thermal protector opens, preventing power from reaching the clutch. The AC thermal protector is located on the compressor. and are backed by the manufacturer's 12 month, 12,000. Our Honda parts and accessories are expedited directly from authorized Honda dealers strategically located all across the U.S. It is sometimes referred to as Honda Blower Motor Resistor, Honda Power Transistor.
MOST COMMON CAUSES OF HONDA AC CLUTCH DOESNT ENGAGEįaulty thermal protector Faulty AC compressor clutch relay Incorrect air gap on the clutch (assuming it has power) The Honda AC thermal protector must show continuity for the AC clutch to engage To ensure reliability, purchase Honda part 79330-S5A-941 Transistor, Power. If the clutch doesn’t engage, perform these tests. If so, check for Honda AC compressor clutch engagement. To start, check high and low system pressures to make sure you’re above the high and low-psi cutoff limits. When you encounter a Honda AC clutch doesn’t engage condition, the problem could be: low refrigerant charge, failed AC compressor thermal protector, or faulty AC clutch relay.
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