Gauge can be repaired if the failure is due to electronics. If it a brand new system, it will be replaced free of charge. If is is out of warranty, call Jeff at
www.howertonengiuneering.com to order a new one.
Make sure it is definately the gauge and not somethung else. It is unusal for the gauge to go wrong as it does not do high current tasks.
Please tell me the nature of the problem and what system (HFS-3?).