# Sync 1 to 3 upgrade (Mondeo Fusion) Will defrost work when activated from sync 3? **URL:** \ **Category:** AsBuilt\ **Tags:** eu, FCIM, BCM, retrofit, SYNC1, nav, APIM\ **Created:** [26 October 2023 21:33 UTC](https://community.cyanlabs.net/t/sync-1-to-3-upgrade-mondeo-fusion-will-defrost-work-when-activated-from-sync-3/11625 "2023-10-26T21:33:22Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Rudolf\_Hajdu](https://community.cyanlabs.net/user_avatar/community.cyanlabs.net/rudolf_hajdu/32/9923_2.png) [@Rudolf\_Hajdu](https://community.cyanlabs.net/u/Rudolf_Hajdu)\ **Post date:** [26 October 2023 21:33 UTC](https://community.cyanlabs.net/t/sync-1-to-3-upgrade-mondeo-fusion-will-defrost-work-when-activated-from-sync-3/11625/1 "2023-10-26T21:33:22Z")
Hi We are doing an upgrade on a Mondeo mk5 from sync 1 to 3. The car is equipped with windshield defrost function by physical button. The question is that if we upgrade to sync 3, can is be activated on the screen in climate options? I heard that it might not work due to fcim/bcm limitations. The new panel we are fitting does not have the defrost button but instead “max AC”, thats why we are considering the on-screen activation option. * * * **SYNC Region:** EU **Navigation Variant:** Nav **Manufacturer Year:** Unknown **Install Type:** Retrofit **Old SYNC Version:** 1 **New SYNC Version:** 3 **Do you have a error message, if so what is it?** Dont know yet. **Update Method:** Official Ford ---
**Author:** ![system](https://community.cyanlabs.net/letter_avatar_proxy/v4/letter/s/bcef8e/32.png) [@system](https://community.cyanlabs.net/u/system)\ **Post date:** [25 November 2023 21:34 UTC](https://community.cyanlabs.net/t/sync-1-to-3-upgrade-mondeo-fusion-will-defrost-work-when-activated-from-sync-3/11625/2 "2023-11-25T21:34:14Z")
Closed on 25 November 2023 21:34 UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.