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critical Honeywell

Error Code Code 4

System tamper — the control panel enclosure has been opened or tampered with.

? What Causes This

Unauthorized opening of the panel enclosure, loose security screws, or cover sensor activation.

✓ How to Fix It

  1. Verify that the panel enclosure is properly closed and secured.
  2. Check that all fasteners are tight.
  3. Enter your security code to clear the tamper alarm.
  4. If the issue persists, contact your installer or service provider.

This error code appears in:

Honeywell Vista-20P Security Panel