can not change heating temp. changed from 80 degrees to 60 degrees still come out hot
Mercury Q&AAsk Your Question
2005 Mercury Grand Marquis Question: heating-control
Answer #1G. T. Service Center (4234 Answers) , Stephenville, TX - (254) 638-3236ProfessorG March 03, 2014, 19:28Master
Temp/blend door actuator would be the most common problem, now changing it another job.
Replyxian12, March 03, 2014, 19:39Rookie
Is that the same as heater control valve
ReplyProfessorG, March 03, 2014, 19:45Master
No. It's a small motor in a plastic box that mounts on the top middle of the heater box under the dash that controls or turns the door from the a/c to the heater core. Just changed one last Friday. Have done many over the years.
Replyxian12, March 04, 2014, 03:12Rookie
adv you nave it done as not to break the doors