Apu Issues...

Topic 21673 | Page 1

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Joshua P.'s Comment
member avatar

Whats going on everyone, i have a problem with my apu. Its a thermoking tripac evolution and it does not start or crank, it recieves power and not kicking off any codes. The fans that are controlled by the apus control panel will not turn on either. I have tried resetting it, checked wireing and fluids and found nothing. Anyone had this problem before that found a solution? Anything ideas will help thanks.

APU:

Auxiliary Power Unit

On tractor trailers, and APU is a small diesel engine that powers a heat and air conditioning unit while charging the truck's main batteries at the same time. This allows the driver to remain comfortable in the cab and have access to electric power without running the main truck engine.

Having an APU helps save money in fuel costs and saves wear and tear on the main engine, though they tend to be expensive to install and maintain. Therefore only a very small percentage of the trucks on the road today come equipped with an APU.

APUs:

Auxiliary Power Unit

On tractor trailers, and APU is a small diesel engine that powers a heat and air conditioning unit while charging the truck's main batteries at the same time. This allows the driver to remain comfortable in the cab and have access to electric power without running the main truck engine.

Having an APU helps save money in fuel costs and saves wear and tear on the main engine, though they tend to be expensive to install and maintain. Therefore only a very small percentage of the trucks on the road today come equipped with an APU.

Turtle's Comment
member avatar

I've had Apu issues but nothing like this. Forgive me for stating the obvious, but did you check the on-off button on the unit itself? Mine has a in-cab on off switch and one on the unit also.

Other than that, my only guess would be the fuse, which in my truck is located in the side box. The fact that the fan isn't working either leads me more in this direction.

APU:

Auxiliary Power Unit

On tractor trailers, and APU is a small diesel engine that powers a heat and air conditioning unit while charging the truck's main batteries at the same time. This allows the driver to remain comfortable in the cab and have access to electric power without running the main truck engine.

Having an APU helps save money in fuel costs and saves wear and tear on the main engine, though they tend to be expensive to install and maintain. Therefore only a very small percentage of the trucks on the road today come equipped with an APU.

Truckin Along With Kearse's Comment
member avatar

Is this new on a new truck or have you had it awhile? new ones need to be primed.

contact the tractor repair shop. they will tell u

Joshua P.'s Comment
member avatar

I did check the engine on/ off switch and its on. UPDATE now the unit has no power, its got to be an electrical problem somewhere. Saw that the didplay flickered and went out. I had the truck for a year and a half the ubit has about 3.5k hours on it. Going to Springfield anyways just got to survive a couple more days. Been driving nights so id be asleep all day where shops are open.

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