I have a 99 expedition now 5.4 ltr, heat does not work nor does the a/c, also has rear a/c and **** fully loaded 4x4, The compressor never clicks on I was thinking a relay??? but I dunno the heat does not work as well, I have a headache on this thing can someone lend me their brain?????

 

The brains for these issues are in the HVAC forum, not the Engines forum.

 

well excuse me!!!!! I was tired last night my mistake then please move to hvac section.

 

It will probably be quicker if you reposted. We only have a couple of moderators who can do that.