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New truck, no ac, dealer says its normal?

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I've worked at Mack dealerships for almost 20 years and I agree your dealer is full of BS, you should be able to hang meat in the cab at idle. Unfortunately I can't fix it from here, I have had to replace a couple of control panels on 2015s to repair A/C system drop out, cant be sure this is your problem.

I have a 2014 Mack Trident with MP8 535 SCR, it is running twin exhaust and has very dirty exhaust, always soothed and staining chrome exhaust tips, is this normal?

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I was always told to bump up the RPMs when idling for a long time. Heard it was to boost the oil pressure.

Now I have a '12 CHU and my blower fan doesn't blow strong all the time. I was told to clean out the box inside, replace the filter and I guess there is a small regulator or something like that underneath there that I should replace. When I get the part I can let you know what the part number is.

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I had the same problem on a 2014 mp8..warm when standing still..the dealer installed an engine fan over ride switch that turns on the fan manually. It solved the problem. I have 40-48 degrees at idle now all day long.

Edited by riderman523

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Can you give me the name and number of your dealer? I talked to my dealer about doing something like that. They said it couldn't be done. Maybe if my dealer talks to your dealer, they will learn how to do it?!?

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H & H Mack Sales Inc. | 80 Green Pond Road, PO Box 693 Rockaway, New Jersey 07866 973-625-3330

Edited by riderman523

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