djgietzen Posted July 31, 2019 Share Posted July 31, 2019 I've got a 2011 Fusion sport that blows hot/warm air all the time. I've also noticed the external air temp on the dash reads between -40 and -20 all the time. I tried replacing the ambiant air temp sensor in the front bumper. No change. I then used a cheapo bluetooth elm tool to clear the codes torque could read. no change. I then pulled the battery for 10 minutes, that messed up the clock but the temp still reads wrong. This car was in a front end crash a while back, and its dual zone auto climate. Looking for suggestions on what to check next. also is there a way to force the ext temp to read like 55 all the time regardless of the real outside temp? 0 Quote Link to comment Share on other sites More sharing options...
eGuru Posted August 1, 2019 Share Posted August 1, 2019 You need to get the ambient air temperature reading to be correct otherwise the ac compressor will not be enabled. Since you have already replaced the ambient sensor, I would suspect a bad connector or damaged wiring. 0 Quote Link to comment Share on other sites More sharing options...
mvan231 Posted August 1, 2019 Share Posted August 1, 2019 Why would you want the external temp to read 55 regardless of outside temperature? It sounds like your temperature sensor was damaged and/or the wiring harness. Since you replaced the sensor already, I would guess you have a shorted / open wire somewhere. -40 is a default reading 0 Quote Link to comment Share on other sites More sharing options...
eianthehero Posted August 3, 2019 Share Posted August 3, 2019 If it is reading at -40 your evap temp sensor may possibly be bad. Is your compressor cycling on at all? If no then that could be a sign of that sensor being bad. It is a pain to change but it is a cheap fix. I am actually doing this in my fusion this weekend. Also i am new to this site and literally joined up to comment to possibly save you money as our issues are very related. Below is the video i am referencing to replace mine by the way, this is not me to take any credit from the author. https://youtu.be/3cfPShi_-Nk 0 Quote Link to comment Share on other sites More sharing options...
eGuru Posted August 3, 2019 Share Posted August 3, 2019 7 hours ago, eianthehero said: If it is reading at -40 your evap temp sensor may possibly be bad. Is your compressor cycling on at all? If no then that could be a sign of that sensor being bad. It is a pain to change but it is a cheap fix. I am actually doing this in my fusion this weekend. Also i am new to this site and literally joined up to comment to possibly save you money as our issues are very related. Below is the video i am referencing to replace mine by the way, this is not me to take any credit from the author. https://youtu.be/3cfPShi_-Nk The OP stated it was the ambient (external) air temperature that was reading -40. Not the evap temp. 0 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.