Hunter Pro-C Suddenly Shows Only 3 Stations

Symptom: Controller Loses Station Recognition

A Hunter Pro-C that previously showed up to 15 stations (with only 8 wired) suddenly displays only 3 stations after a manual run. Resets and module removal don't help.

Root Cause: Main Board Failure

The controller's microprocessor is no longer detecting the expansion modules. The earlier appearance of stations 10–15 (when only 8 exist) suggests a memory corruption or display driver fault.

Troubleshooting Steps

1. Remove 9 V battery and disconnect AC power for 2 minutes.
2. Ensure all modules are firmly seated (clean contacts with electronic contact cleaner if needed).
3. Power up without battery; check station count.

If Still Only 3 Stations

The main controller is defective. Check hunterindustries.com for firmware updates or troubleshooting, but replacement is usually necessary.

Moisture Check

Inspect the enclosure for water intrusion. Even minor condensation can corrode the backplane connectors over time.