What does a fan clutch solenoid do?
A Horton fan clutch’s prime function is to engage and disengage the engine fan with a clutch controlled by an air-actuated solenoid valve. On modern vehicles the solenoid receives signals to turn on and off from the engine’s ECU.
What is a fan solenoid?
The solenoid valve can be thought of as the “heart” of the control system, opening and closing to regulate airflow to the fan drive. Air pressure from the vehicle’s air system is fed into one of the inlet ports, and the outlet port is connected to the fan drive.
What happens when a fan clutch goes bad?
A bad fan clutch may not engage properly or at all, and as a result, will disable the fans or prevent them from working at maximum efficiency. This may result in the engine overheating, which will lead to more serious issues if left unattended.
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 do I hear a hum on my Freightliner?
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. Either of these two scenarios will require that the compressor be replaced.
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.
Can a truck engine fan stay on all the time?
If the fan shuts off when you turn off both blowers inside, it’s going to be an A/C problem. YES ! ! ! There is life after trucking. Freightliner century class engine fan stays on all the time. When ignition is turned on, the screen in dash will show active fault.