Good to know. It honestly easiest to just enable the screen button and be done with it versus digging into the dash to swap the HVAC and everything that goes along with it. A lariat is pretty simple swap, but XLTs and lower are running into fits depending what features their seats have and not and what features want to work like they should.
If I remember right, Jesse said that the hvac module requires the DSM (drivers seat module) for the lariat hvac panel to work right
Correct, you pretty much have to config the DSM to match how the HVAC is setup, that way they are both sending and receiving the same messages. The DSM will think it has heated and/or cooled seats, but they aren't actually in the seat.
In trucks w/ no DSM, but with heated seats like XLT or 401s, the HVAC unit outputs the seat heat power to the seats directly -- it's an odd choice how it's done. W/ no DSM there's nothing to program (in the DSM) as it's not there. I've seen 4 different non DSM trucks accept and power the seat heat w/ the HSW/H/C HVAC unit with no DSM present.
I have an XLT with heated seats. I tried 2 different HVAC modules with buttons for heated and cooled seats. I could not get them to turn on the heated seats. I am pretty sure that the heated and cooled seats have their own module in 1 of the seats and thus it is not present in the HVAC module and thus won’t be able to turn on heated seats in an XLT truck. There was another person I believe in the beginning of this thread that had the same issue.Ok. In response to all you fellas that provided comments and help, this is a "Reply to all". Too many to tag!
I FINALLY got the HSW to work. I backed out ALL Forscan changes and reloaded each module codes in efforts to make the "replacement HVAC" (with HSW button and Heated & Cooled seats). It still proved to be in vain. I reinstalled my stock HVAC (with only the 3 stage heated seat buttons) and once I did this my seats began working again, AND the HSW now works!
I am NOT saying the replacement HVAC is not compatible with the XLT 302A. I may still have not set all module parameters correctly. But I did everything everyone suggested and in different orders.
I can only share that if you have an XLT with ONLY heated seats, trying to make an HVAC with heat & cool buttons work may be futile. ?
Moving on... I loaded the Superduty climate screen to access the HSW soft button and played with the heat all the way to work - even if it was in the 60's this morning.It doesn't feel as warm as my Mustang's wheel though. I'll have to play with the SCCM temp settings now.
Thanks again for all the responses and help!
You can't just drop them in. If they're programmed already (aka used), you can forscan the change in. Some modules come from the factory without programming on them, and without FDRS, you're not going to get them to work.
I went in Forscan and made the changes necessary to all the modules but could not get either lariat level HVAc module to turn the heated seats on. I did not see the conversations above until after I posted my recent comment.
