E2:00 🟡 Repair Required
Fujitsu Error Code E2:00: Room Temp Sensor Open Circuit
⚠️ The indoor unit isn't reading the room temperature, so the system has shut down to prevent overheating or freezing. This requires professional diagnosis.
How to Fix Fujitsu Code E2:00
- Step 1: Power cycle the unit by turning off the breaker that supplies power to the indoor unit for 5 minutes, then turn it back on. This may reset the system and clear a temporary error.
- Step 2: Visually inspect the area around the indoor unit for any obvious signs of damage, such as chewed wires or loose connections. Do not open the unit.
- Step 3: If the error persists after power cycling and you see no obvious damage, contact a qualified HVAC technician to diagnose and repair the issue.
What Does Fujitsu Error Code E2:00 Mean?
The Fujitsu error code E2:00 indicates that the indoor unit's main control board isn't receiving a signal from the room temperature sensor. This sensor, also called a thermistor, is responsible for telling the system the current room temperature. Without this information, the unit can't properly regulate heating or cooling, and the system will lock out to prevent potential issues like the unit running constantly or not at all. This error is specific to the indoor unit and will prevent it from operating until the issue is resolved. It's important to address this promptly to restore comfortable temperatures and efficient operation.
Common Causes of Fujitsu Code E2:00
- Faulty room temperature sensor (thermistor)
- Loose or damaged wiring between the sensor and the main control board
- Corrosion on the sensor or control board connections
- Defective main control board in the indoor unit
- Rodent damage to the sensor wiring
Applicable Fujitsu Models
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Find a Licensed Tech Near You →Replacement Parts for Fujitsu HVAC System Code E2:00
Room Temperature Sensor (Thermistor) OEM: 9704378071
Main Control Board