An air dryer's desiccant cartridge is due for replacement but hasn't been changed. What is the risk?

Pick an answer

1. The dryer becomes less effective at removing moisture, so more water can reach the tanks and brake components
2. The compressor will stop building air pressure completely
3. The horn will stop working until it's replaced
4. It has no effect, since the cartridge only filters dust from the cab vents, not the brake air supply itself

Correct!

Not quite. The correct answer is highlighted.