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Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3382
Experience:  ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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When I change the switch from vents to floor.. it only blows

Customer Question

when I change the switch from vents to floor.. it only blows out defroster. bought new control panel and it still wont work
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Jeremy replied 1 year ago.

My name is ***** ***** I will assist you.

What is the year, make, model of the vehicle? What engine does it have?

You want a 5 star service and I want to provide a 5 star service. Please consider that I don't know your skill level as well as I can't see,
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Customer: replied 1 year ago.
2006, 379 Peterbilt
Expert:  Jeremy replied 1 year ago.

When you said you replaced the control panel, are you referring to the whole dash unit? Was it programmed to the truck?

Expert:  Jeremy replied 1 year ago.

I believe your year is full electronic and there is a small module in the control panel that needs to be programmed.

Customer: replied 1 year ago.
how do you do that
Expert:  Jeremy replied 1 year ago.

On this model you will have to have Peterbilt do it with the Paccar program.

This is the one with the full electronic controls, right? Some of the 2006 Pete 379s didn't have them. Only yhe upgraded ones with the custom package did. Which one do you have?

Expert:  Jeremy replied 1 year ago.

How you can tell is when you changed the control panel out, you would have only one plug going to the control panel. If more than one plug, you have the older style and that is different.

If the older style, then most likely the actual control mechanism to do the switching on the left side of the air box is what is malfunctioned, and no programming is needed for that style.