B5

Gree B5 Error Code – Inlet Tube Sensor Malfunction

Air Conditioner · HIGH Severity

HIGH severity Air Conditioner Model: Gree Pular 9000 BTU
What This Error Means
Inlet tube temperature sensor malfunction detected
Diagnostic & Repair Steps
1
Power Cycle Unit
Turn off the unit at the circuit breaker. Wait 5 minutes, then turn it back on. Check if error b5 clears. 🔧 None
RESET ~5 min
2
Locate the Sensor
Open the unit cover and locate the relevant thermistor/sensor. Refer to the service manual wiring diagram for the exact sensor position. 🔧 Screwdriver, flashlight
INSPECT ~10 min
3
Check Sensor Connector
Disconnect and reconnect the sensor connector on the PCB. Inspect for corrosion, bent pins, or loose connections. 🔧 Needle-nose pliers
CHECK ~5 min
4
Measure Sensor Resistance
Using a multimeter set to Ohms, measure resistance across sensor terminals. At 25C should read approximately 10k-Ohm. Refer to service manual for the temperature-resistance table. 🔧 Digital multimeter ⚠️ Disconnect power before measuring sensor resistance
TEST ~15 min
5
Replace Sensor
If resistance is out of range (open circuit or short circuit), replace the NTC thermistor sensor. Order the correct part using the model number. 🔧 Soldering iron or connector tool
REPLACE ~20 min

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