Question 1

Device not heating

Accepted Answer

Possible cause: The unit is thawing itself (this happens automatically at outside temperatures between 4°C and 7°C), or the outside temperature is below 4°C.. If the outside temperature is between 4°C and 7°C, simply wait for the automatic defrost cycle to finish. Below 4°C, heating isn't possible at all.

Question 2

Device cooling / heating inadequately or not at all

Accepted Answer

Possible cause: Filter soiled or external air routes soiled / blocked. Clean or change the filter, and inspect external air routes to remove any blockages.

Question 3

Moisture forms under the air distributor

Accepted Answer

Possible cause: High humidity and open windows or doors. Close all the windows and doors, and set the fan to a high level.

Question 4

Water drips out of the air distributor

Accepted Answer

Possible cause: The external unit's condensation trap is blocked, the seal between the unit and the roof has failed, or the system is mounted at too steep an angle.. Check and clear the condensation trap, inspect roof seal integrity, and ensure the vehicle is parked within the permissible operating angle. If the issue remains unresolved, contact an authorised service agent.

Question 5

Remote control not working

Accepted Answer

Possible cause: Batteries flat or inserted incorrectly. Check batteries in the remote control, ensure correct polarity, and replace if necessary.

Question 6

The unit isn't responding to remote control commands

Accepted Answer

Possible cause: Obstructions between remote control and IR receiver, or remote control not tuned to the IR receiver. Check for anything blocking the line of sight between the remote and the IR receiver, and confirm the remote is correctly paired to the receiver - re-pair it if not. If none of this fixes it, get in touch with Truma Service.

Truma Aventa Comfort

Technical Specifications

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	Device not heating	The unit is thawing itself (this happens automatically at outside temperatures between 4°C and 7°C), or the outside temperature is below 4°C.	If the outside temperature is between 4°C and 7°C, simply wait for the automatic defrost cycle to finish. Below 4°C, heating isn't possible at all.	DIY Safe
`N/A`	Device cooling / heating inadequately or not at all	Filter soiled or external air routes soiled / blocked	Clean or change the filter, and inspect external air routes to remove any blockages.	DIY Safe
`N/A`	Moisture forms under the air distributor	High humidity and open windows or doors	Close all the windows and doors, and set the fan to a high level.	DIY Safe
`N/A`	Water drips out of the air distributor	The external unit's condensation trap is blocked, the seal between the unit and the roof has failed, or the system is mounted at too steep an angle.	Check and clear the condensation trap, inspect roof seal integrity, and ensure the vehicle is parked within the permissible operating angle. If the issue remains unresolved, contact an authorised service agent.	DIY Check / Tech Fallback
`N/A`	Remote control not working	Batteries flat or inserted incorrectly	Check batteries in the remote control, ensure correct polarity, and replace if necessary.	DIY Safe
`N/A`	The unit isn't responding to remote control commands	Obstructions between remote control and IR receiver, or remote control not tuned to the IR receiver	Check for anything blocking the line of sight between the remote and the IR receiver, and confirm the remote is correctly paired to the receiver - re-pair it if not. If none of this fixes it, get in touch with Truma Service.	DIY Check / Tech Fallback