4 speed fan to 7 speed fan controller.

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Rwgarrison23

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This is one of the things I miss about my 1500 tradesman, it had a 7 speed hvac fan control. My new 2018 ram 2500 I just picked up also is a tradesman with manual 4x4 transfer case on the floor, has a 4 speed fan control. What does it take to convert 4 to 7 speed? I'm not looking to change my radio screen size.
 

O.R.T.

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Do a forum search, I remember this came up before and all it boiled down to was IIRC is a p# difference, literally plug and play with the other style.
 

clifford15

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What do I type in? I'm a rookie using this site.

Check out M2 Mods in the vendor section. Converting to 7 speed is part of the 8.4 upgrade. I did my 15 with the addition of auto temp control sensor harness from @Mpgrimm2 it was a fairly easy project.
 
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Rwgarrison23

Rwgarrison23

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Check out M2 Mods in the vendor section. Converting to 7 speed is part of the 8.4 upgrade. I did my 15 with the addition of auto temp control sensor harness from @Mpgrimm2 it was a fairly easy project.

I'll do a search here shortly, so that 8.4 upgrade involve new blend air door or anything behind the dash?
 

clifford15

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I'll do a search here shortly, so that 8.4 upgrade involve new blend air door or anything behind the dash?

No. Single zone ATC doesn’t require messing with the blend doors.
 

clifford15

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There is a thread for doing the dual zone ATC conversion. It is quite involved requiring the replacement of the heater box.
 

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