My Alarm Panel Is Beeping. How Do I Make It Stop?
A security panel that starts beeping on its own is trying to tell you one specific thing — it is almost never an alarm, and it is almost always something you can quiet in two minutes. Here is how to read the beep on a modern Qolsys IQ Panel, then on the older Honeywell and DSC keypads still in thousands of Utah homes.
First, which beep is it?
- Chime — a short tone when a door or window opens. Normal. Turn it off in settings if you don’t want it.
- Entry / exit delay — steady beeping for 30–60 seconds after arming or after opening the door while armed. Normal. Enter your code.
- Trouble beep — a repeating beep every few seconds (or once a minute) with no door open and the system disarmed. This is the one this guide is about.
Qolsys IQ Panel 4 and IQ Panel 2+
- Silence it. Tap the screen and tap OK or Acknowledge on the message that appears. The beeping stops; the trouble condition is still logged.
- Read the trouble. Swipe down from the top of the screen and tap the small triangle or bell icon, or go to Settings → Advanced Settings → System Tests → Trouble. The list names the exact condition.
- Match it to the fix below.
- “AC Power Failure” / “Panel on battery” — the plug-in transformer is unplugged or the outlet is dead. Check the outlet (often in a closet or utility room, sometimes on a switched circuit). The panel runs on battery for a few hours, then shuts down.
- “Low Battery” on the panel — the internal backup battery is worn out, typically after 3–5 years. It is a user-replaceable pack; we can bring one on any service visit.
- “Low Battery” on a sensor — the message names the sensor (“Front Door”, “Basement Motion”). PowerG door contacts take a CR123A or CR2 lithium cell; motions and smokes vary. Replace the battery, close the cover, and the trouble clears on the next check-in.
- “Tamper” — a sensor cover or the panel’s own back plate is open. Press covers firmly closed; check that the panel is seated on its wall mount.
- “Communication Failure” / “Cellular” / “Wi-Fi” — the panel can’t reach Alarm.com. Reboot your router first. If Wi-Fi is fine and the cellular icon is still red, the LTE radio needs attention — call us.
- “Sensor Not Responding” / “Supervision” — a sensor hasn’t checked in. Usually a dead battery, occasionally a sensor moved out of range. Replace the battery; if it persists, we re-pair or relocate it.
Honeywell VISTA (6160 / 6150 / 6162 keypads)
The two-line green keypads speak in codes. Press * then your code plus 1 to silence, or simply enter your code and press OFF twice. Then read the display:
- “Check 103 LngRng Radio” — the cellular or internet communicator has lost connection. Often the old radio has been sunset by the carrier. This is the most common reason we get called to a VISTA, and it is fixable without replacing the panel — see our note on the Alarm.com Universal Communicator.
- “BAT” or “Lo Bat” with a zone number — that wireless sensor needs a battery. With no zone number, it is the panel’s 12-volt backup battery in the metal can.
- “AC LOSS” / “NO AC” — the transformer (a small cube plugged in near the can) is unplugged or the outlet is dead.
- “FC” (Failed to Communicate) — the panel tried to report and couldn’t. If you still have a landline connected, it may be gone; if you have a communicator, it’s the same fix as Check 103.
- “Check” + zone number — a wired zone is open or tampered: a loose window contact, a chewed wire, a sensor knocked off the frame.
DSC PowerSeries (PK5500 / PC1555 keypads)
A yellow Trouble light plus beeping. Press * then 2 to open the trouble menu; the number that lights up is the condition: 1 service required (usually low panel battery), 2 AC loss, 3 phone line, 4 failure to communicate, 5 zone fault, 6 zone tamper, 7 device low battery, 8 loss of clock. Press # to exit. Number 8 is the classic after a power outage — set the time and it clears.
When to stop troubleshooting and call
- The trouble comes back within a day after you fixed the obvious cause.
- Any communication or radio trouble on a panel more than a few years old — the radio may be on a retired network and the system may not be reporting at all.
- You don’t know the installer code, the monitoring company won’t answer, or the company that installed it is gone. That is a takeover, and it is routine work for us.
A beeping panel is not a broken panel. It is a panel doing its job — a system that quietly stopped reporting is the one to worry about. If you silenced a communication trouble and moved on, it is worth a call to confirm the monitoring center can still hear the house.
Shield Low Voltage services Qolsys, Honeywell, DSC and Interlogix systems across Utah County, Salt Lake County, Park City and the Heber Valley, whoever installed them. Month-to-month monitoring, no contracts.
