Lexuss07

Have 2017 ES350. Car has 50,500 miles on it with Extended Platinum Warranty (Thank God).
Outside temp is 15 degrees. Climate control set at 72 degrees. Set to auto where the A/C will not automatically turn on. First 30 minutes, heat works fine. After vehicle is warmed up, and is set to Auto, it is blowing cool air and the vent setting automatically changes from FLOOR to FACE and FLOOR at 72 degrees. I have to set it to 78 degrees to get any heat to the FLOOR vents. When the vehicle is sitting in a parking lot and is set to 78 degrees, it eventually goes to FACE and FLOOR and is blowing lukewarm air.

Does anyone have an idea what wrong? My 2007 RX 350 heat works flawlessly when it is set to 72 degrees.

Thank you.

lexusisgs

https://www.clublexus.com/forums/es-...-pictures.html

i hope this can help to try first ......

lexusisgs

if this link is not solution than one of temp sensors having issue or some of the relays got stuck ...if you got any MIL code it will help to diagnose problem,

Lexuss07

Thank you.