Index: dialin/hd/alarms.py
===================================================================
diff -u -r3559c80a045fc8cb5f2d994930284b435f939caf -r1c910d67486cc97283158aa4eedc57de24fb752d
--- dialin/hd/alarms.py	(.../alarms.py)	(revision 3559c80a045fc8cb5f2d994930284b435f939caf)
+++ dialin/hd/alarms.py	(.../alarms.py)	(revision 1c910d67486cc97283158aa4eedc57de24fb752d)
@@ -22,7 +22,7 @@
 from collections import OrderedDict
 import struct
 from logging import Logger
-from ..common.alarm_defs import AlarmList
+#from ..common.alarm_defs import AlarmList
 
 
 class HDAlarms(_AbstractSubSystem):
@@ -217,6 +217,33 @@
         alarm_id = struct.unpack('<H', bytearray(message['message'][self.START_POS_ALARM_ID:self.END_POS_ALARM_ID]))
         self.alarm_states[alarm_id[0]] = False
 
+    def cmd_clear_all_alarms(self):
+        """
+        Constructs and sends the clear all active alarms command.
+        This will clear even non-recoverable alarms.
+        Constraints:
+            Must be logged into HD.
+
+        @return: 1 if successful, zero otherwise
+        """
+
+        key = integer_to_bytearray(0xD2C3B4A5)
+        payload = key
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_SUPER_CLEAR_ALARMS_CMD.value,
+                                              payload=payload)
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            self.logger.debug("All alarms cleared.")
+            # response payload is OK or not OK
+            return 1 == received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        return False
+
     def cmd_alarm_state_override(self, state, alarm, reset=NO_RESET):
         """
         Constructs and sends the alarm state override command