SAFARI Trek 2002 Owner's Manual page 104

The problem may require a trained technician. Moisture in the tank may have "frozen" the
regulator, and requires purging. Take your coach to a service center.
Problem: Gas flow is inconsistent.
Check for debris or corrosion on the regulators. If any is apparent, take the coach to a
service center for repair.
Although unlikely, an overfilled tank could cause this problem.
Moisture or a faulty regulator can cause this problem. Take your system to a service center.
WARNING: Do not attempt repairs on your own. A trained technician should
Trek Owner's Manual
8 ~ 104
complete all repairs.