October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
DTC U0424: Invalid Data Received From HVAC Control Module: Description
WARNING: This page is about a different car, the 2020 Lincoln MKZ and 2019 Lincoln MKZ. However, it is still accessible from the selected car via links, so may be relevant.