Hi All,

This is a question for any peeps out there that drive or have driven a Century Class Freighliner. I just started driving this truck for a fella that leases the truck to Acme out of Houma, LA. I love the truck. (Beats the hell out of the mini-floats I had been driving) Anyway, the only problem with the truck is that I can't get any heat. We checked the line that runs from the radiator and (according to the owner) supplies the heat to the truck. All the valves appear to be open and the hose is hot to the touch but the vents still blow cold air. Has anyone else out there ever come across this problem and if so, how did you solve the problem.

Thank you,

Jim

 

Make sure BOTH valves are open, and you have plenty of coolant.

 

Hey Blind Driver,

Thank you very much for the reply. We did check each valve and even though the coolant wasn't too low, we topped it off and tried again. Still no luck. From what I can see, the hose comes off a radiator hose and leads to a valve. From that valve the hose leads to a filter and from there leads back to the radiator hose through another valve. I am wondering if the filter is clogged or one of the hoses.

Thanx,

Jim

 

What about the selector switch. it is blowing hot air in a different vent , ie the dash?

Husband said his selector switch goes on the fritts a lot.

TW

 

If it is a sleeper truck do you have heat back there?

 

blowing cold air--or no air---check the cab air filter to see if it's clogged.

does the truck have opti-idle? or the computer info center--with push the diagnostic button and see if you have any errors that read HVAC response lag or something about HVAC Controller?

how about the water temp---what's it idling at?

 

It has been over 3 years since I've been around a truck but if I remember right there are 4 valves on a Freighliner that has a sleeper.

kc0iv

 

Hey Y'all,

So far I have only messed with the valves that according to the owner, are responsible for providing heat to the front of the truck. I can see the the hoses and valves that are for the sleeper but have not messed with them. According to the owner, the heating/cooking to the sleeper part of the truck is temporarily "out of service".

Jim

 

Hey Headborg,

The truck comp info readout says that there is one "fault" but I have not been able to figure out how to find out what it is. Not sure if I have to hook the chip up to a diag comp or not. Since I am fairly new I am not sure what you mean by "opti-idle" but I do have a toggle switch where I can increase or decrease the trucks idle speed. Please pardon my stupidty, I am still learning.

Jim

 

Hi Trukrswyfe,

I am getting cold air out all vents from what I can tell. I have tried defrost, feet, and straight on.

Thanx,

Jim