Error 65 - Room sensor 2 fault

What does 65 mean?

The user interface displays '65: Room sensor 2', indicating an issue with the secondary room temperature sensor. This error typically triggers an automatic reset.

• Faulty room sensor 2.
• Damaged or loose wiring to the room sensor.
• Sensor location is not optimal (e.g., in direct sunlight, near a draft), causing incorrect readings.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the heat pump for 30 seconds, then turn it back on.

2. 2

   Check the room sensor for any physical damage or ensure its connections are secure.

3. 3

   Allow time for the automatic reset to occur (default 6 hours) or use the manual reset function (Line 6711) if available.

4. 4

   Contact a qualified service technician to inspect or replace the room sensor.