FORScan forum

Posted: **Sat Mar 21, 2026 5:11 am**

In FORScan version V2.4.22beta, after modifying values in the HVAC module and attempting to write them, I received a prompt stating that the service routine had been interrupted. The hardware I am using is an OBDLink EX, with the firmware updated to the latest version. Does anyone know what might be causing this? Writing modified values to the BCM module works without any issues. The vehicle is a 2023 Ford F-150 (3.5TT Gasoline).

Posted: **Wed Mar 25, 2026 8:05 am**

Today, I successfully modified and wrote values to the HVAC module on a 2024 F550; however, for some reason, the HVAC module on a 2023 F150 would not allow the write operation.

FORScan forum

Attempting to modify and write values to the HVAC module using FORScan failed.

Attempting to modify and write values to the HVAC module using FORScan failed.

Re: Attempting to modify and write values to the HVAC module using FORScan failed.

FORScan forum

Attempting to modify and write values ​​to the HVAC module using FORScan failed.

Attempting to modify and write values ​​to the HVAC module using FORScan failed.

Re: Attempting to modify and write values ​​to the HVAC module using FORScan failed.

Attempting to modify and write values to the HVAC module using FORScan failed.

Attempting to modify and write values to the HVAC module using FORScan failed.

Re: Attempting to modify and write values to the HVAC module using FORScan failed.