Fault codes / Safe-T-Alert / Red and green alternating, two beeps every 15 s
Safe-T-Alert: Red and green alternating, two beeps every 15 s
What it means: Malfunction.
What to check
Sensor failed or contaminated. Mute does nothing. Check 12V at the detector (7 to 16 VDC), then replace the detector.
Learn the system
Practice it on a service call
Guided diagnosis
Other Safe-T-Alert codes
- Safe-T-Alert: Solid green Normal
- Safe-T-Alert: Flashing yellow Warm-up after power is applied
- Safe-T-Alert: Flashing red, continuous tone Gas alarm
- Safe-T-Alert: Flashing red, beep every 30 s Alarm during a mute cycle
- Safe-T-Alert: Chirp with low coach voltage Low voltage
- Safe-T-Alert: Chirp, detector 5 to 7 years old End of life
Full field guide: Safe-T-Alert LP and CO detector
Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.