NEW AC PROBLEM (blows cold and warm alternately)

Post Reply
kahunna
New Member
Posts: 6
Joined: Mon Jun 25, 2012 2:13 pm

NEW AC PROBLEM (blows cold and warm alternately)

Post by kahunna » Wed Aug 22, 2018 10:30 am

'07 FS Ltd: New compressor and complete system replacement (per warranty requirements)in May of 2017.
Very cold air until two Saturdays ago, when (after using ac most of day) air blowing suddenly turned warm. Now air blows cold and warm alternately, with no pattern as to outside temps or useage time. Only consistent is that every am at 5-6, when I leave my house, ac blows cold for about 1/2 hour, then blows warm. Sometimes blows cold, sometimes blows hot during the course of a day (I drive to appointments all day).
Fans are on; compressor is not when warm air blowing; no codes at all showing up; freon good all pressure readings are good; but computer is not recognizing when ac switch is pressed, or when auto switch is pressed, as "not pressed" comes up on display; defroster blows hot air when temp turned up, but will not blow cold when temp is turned down.
Any ideas?
Thanks, k
Last edited by Kate on Sun Sep 02, 2018 4:22 pm, edited 1 time in total.
Reason: edited title


kahunna
New Member
Posts: 6
Joined: Mon Jun 25, 2012 2:13 pm

Re: NEW AC PROBLEM

Post by kahunna » Wed Aug 29, 2018 1:19 pm

So,for those interested...problem was diagnosed when ac stopped coming on at all (about a week ago). Turns out, it was a bad ac high pressure switch at the compressor that protects the compressor by cutting it off. $200 and back on the road again.

RVAFreestyle
Regular Member
Posts: 181
Joined: Tue Dec 22, 2015 4:09 pm

Re: NEW AC PROBLEM

Post by RVAFreestyle » Wed Aug 29, 2018 5:24 pm

Was just about to post up check psi switch
ASE Master Tech L1, X1, A9
ASE Master Collision Repair Technician
ASE Parts & Collision Estimator Certified

2010 Expedition, 2005 Freestyle, 1999 Explorer Sport, 1997 Mustang GT

Post Reply