What are the problems with my Freightliner Columbia?

Freightliner Columbia 2006 is having AC problems. I have A/C problems in… I have A/C problems in my 2006 Freightliner Columbia truck. System is full charged but no power going to compressor. I connected compressor directly to 12 v supply is working and A/C blowing cold air as well.

What should I hear when my AC unit fails on a Freightliner?

Freightliners use a simple dial on the HVAC control unit to control the setting of the AC system. On a freightliner, the sound of the compressor starting is unmistakable. You should hear a low “hum” followed immediately by the cooling fan turning on. If you do not hear the compressor, it may have failed or is leaking.

Why does my Freightliner engine keep getting warm?

Freightliner trucks normally have a water temp gauge in the center of the dash-making it easy to know when your truck’s engine is warm. The reason for failure on freightliners is almost always a leak in the compressor due to a failure at the cooling line to air compressor seal.

What causes a Freightliner truck to lose fire?

The tach and speedometer will go to zero while the warning beeper is screaming, the shift indicator will go blank, sometimes the truck and traliler ABS indicator sounds as well. Normally the truck will keep running even while on cruise, and ever so often the truck will lose fire.

How to troubleshoot a / C problems in Freightliner Trucks?

A specially trained mechanic should fix any problems with the AC system, but you can troubleshoot to verify that there is a problem. Turn the engine on and allow the truck to warm up to its normal operating temperature. The water temperature gauge needle should sit in the center of the upper and lower marks on the gauge.

When do you Loose the marker lights on a Freightliner?

Discussion in ‘ Trucks [ Eighteen Wheelers ] ‘ started by blackcoal, Jan 23, 2016 . On my freightliner Classic I have an issue when I turn the headlights on. I loose the marker lights, clearance lights, and tail lights.

What to do if your Freightliner dash is dead?

Back lights work and turn signal lights work, other than that the dash is dead…….help! What you have is a bad solenoid. It can be found with your fuse panel. With the key on take a test light ground it and check for 12 volt power at the solenoid. There should be two cables on the solenoid.

How can I tell if my Freightliner instrument cluster is defective?

With the key on take a test light ground it and check for 12 volt power at the solenoid. There should be two cables on the solenoid. You should have 12 volts on both sides of the solenoid if not then your solenoid is defective. When you get a replacement be sure that it is a 12 volt continuous duty solenoid of adequate amp capacity.

What kind of engine does a 2006 Freightliner Columbia have?

2006 Freightliner Columbia 120 Detroit 14L 455 hp with engine brake, block heater, 10 speed manual, 3.70 ratio, air ride cab & suspension with dump, s… Create a MyTrader account for free. 2006 FREIGHTLINER, FLD120, Heavy Duty Trucks – Dump Trucks, Caterpillar C13 ACERT, Manual, **PRICE SLASHED!!**

Is the a / C on my Freightliner truck working?

I connected compressor directly to 12 v supply is working and A/C blowing cold air as well. Also checked low and high-pressure sensors mounted on receiver dryer, sensors are ok but it is no any supply voltage on low pressure sensor. I exchange A/C Control module from other truck still now power.

Who are the owners of the Freightliner truck?

Freightliner Trucks is a division of Daimler Trucks North America LLC, a Daimlercompany.

What are the switches on a Freightliner Columbia?

One of those switches is white with blue connector no ground no power, other switch has ground and power. Ok, so there is loss between the two switches. First, check harness on that side and make certain the two wire plug didn’t come unplugged. If you trace from the switch, you should see the plug along the way.

How to fix ECM on a Freightliner Columbia?

Go behind drivers seat and find rear fuse panel, pull all and clean corr. off all find the water leak and fix all seams above breaker panel with auto body sealer, has the wiring harness from L side of firewall to motor ever been replaced? Click to expand… You mean panel on the left side of the driver seat?

What causes a Freightliner air compressor to fail?

The reason for failure on freightliners is almost always a leak in the compressor due to a failure at the cooling line to air compressor seal. This, in turn, causes the compressor motor to continue running while coolant leaks out of the system.

What does an evaporator do on a Freightliner truck?

An evaporator is used on freightliner trucks as a heat exchange medium to move the heat generated by the system away from the air conditioning unit. The most common problem with a freightliner AC system is a leaking compressor.

Where is the head unit on a Freightliner Columbia?

Head unit is the main switch in the dash. If you have power to high pressure, then the connection between the high pressure switch and low pressure switch is the fault. Power goes this way. Head unit (controls in cab at dash or main switch) to plug at firewall. Then power goes to high pressure switch. The power then goes to low pressure switch.

How does a Freightliner air conditioner system work?

Freightliner AC systems are much larger than most vehicle systems, and they use a larger condenser and an air compressor to cool the air. An evaporator is used on freightliner trucks as a heat exchange medium to move the heat generated by the system away from the air conditioning unit.

What are the problems with my Freightliner Columbia?