Either a faulty power generation unit, or a faulty inverter. Depends on specifically WHICH APU you have, as some have full power generation and HVAC, while others might just have an alternator which charges the batteries and leaves truck systems running off of the batteries.
An APU, Auxiliary Power Unit, is used on a truck primarily for driver comfort. In order to meet EPA diesel emission requirements truck operators can no longer idle their truck engine while they are stopped for extended periods of time. An APU can provide heat, air conditioning and electricity for hotel loads such as microwaves, televisions and block heaters. An APU will consume less fuel ( about 1/10th) than that of the truck engine. An APU is a very broad term for a unit that may only provide heat, heat and air or heat, air and electricity. APU's that provide electricity must include a generator.
I have yet to see an Walmart truck equipped with one.
Depends on what unit you have. Typically, you have to have the key in the off position, and then you hit a button on the control box in the sleeper to turn the APU on. Depending on your settings, the APU might be set up to only operate within a certain temperature range.
What do u need for a dodge truck if u are needing to run a tool that is 120volts a inverter or converter
Apu comes from India.
Apu
Apu was born in India
Apu Nahasapeemapetilon http://en.wikipedia.org/wiki/Apu_Nahasapeemapetilon
The World of Apu was created in 1959.
Apu - magazine - was created in 1933.
apu does in his last name: nahasapeemapetalan
James Woods