41 - Room temperature sensor error.
The official Fujitsu General error table identifies code 41 as a room temperature sensor error.
Family context is taken from Fujitsu General's floor-mounted split-system product pages. Error-code mappings below are conservatively taken from an official Fujitsu General installation-manual error table for a floor-mounted indoor unit, so exact display behavior and applicability can vary by controller and connected system type.
Severity
High
Display
Shown by the indoor-unit error indication during operation in the official table.
Support first?
Often not
Models in range
AGU9RLF, AGU12RLF, AGU15RLF
What to do first
Start with these checks
- 1Stop using the system if temperature control becomes erratic
- 2Record the code before power-cycling once
- 3Arrange service if the code returns
Likely causes
What usually sits behind this code
Room temperature sensor fault
Sensor wiring or connector issue
Control board cannot read the room sensor correctly
Contact support
Contact customer support if any of these apply
- !The unit will not regulate temperature normally
- !The code returns after a restart
- !Cooling or heating stops unexpectedly
- - The official table gives the sensor name but not a detailed consumer troubleshooting flow.
- - Sensor-related faults usually need electrical diagnosis rather than filter or settings checks.
Related codes
Nearby codes in this family
Source notes
Source and scope
Source: Fujitsu General installation manual
Official error-code table snippet for a Fujitsu General floor-mounted indoor unit lists code 41 as Room temp. sensor error.
Last reviewed: 2026-04-19
Use this as an official-first pointer, not a repair authorization. Exact troubleshooting steps and code visibility vary by model, controller, and system configuration.