diff --git a/mission/acs/SusHandler.cpp b/mission/acs/SusHandler.cpp
index fd06b9ab..58280636 100644
--- a/mission/acs/SusHandler.cpp
+++ b/mission/acs/SusHandler.cpp
@@ -97,7 +97,9 @@ ReturnValue_t SusHandler::interpretDeviceReply(DeviceCommandId_t id, const uint8
   // appear sometimes for the SUS device: Allow invalid message up to a certain threshold
   // before triggering FDIR reactions.
   if (reply->tempRaw == 0xfff and not waitingForRecovery) {
-    if (invalidMsgCounter == susMax1227::MAX_INVALID_MSG_COUNT) {
+    if (invalidMsgCounter == 0 and invalidMsgPeriodCounter == 0) {
+      triggerEvent(TEMPERATURE_ALL_ONES_START);
+    } else if (invalidMsgCounter == susMax1227::MAX_INVALID_MSG_COUNT) {
       triggerEvent(DeviceHandlerIF::DEVICE_WANTS_HARD_REBOOT);
       waitingForRecovery = true;
     }
diff --git a/mission/acs/SusHandler.h b/mission/acs/SusHandler.h
index e35185b7..43c49dcb 100644
--- a/mission/acs/SusHandler.h
+++ b/mission/acs/SusHandler.h
@@ -17,6 +17,9 @@ class SusHandler : public DeviceHandlerBase {
   static const uint8_t INTERFACE_ID = CLASS_ID::SUS_HANDLER;
   static const uint8_t SUBSYSTEM_ID = SUBSYSTEM_ID::SUS_HANDLER;
 
+  //! [EXPORT] : [COMMENT] Detected invalid values, starting invalid message counting
+  static constexpr Event TEMPERATURE_ALL_ONES_START =
+      event::makeEvent(SUBSYSTEM_ID, 0, severity::MEDIUM);
   //! [EXPORT] : [COMMENT] Detected valid values for a prolonged time again, resetting all counters.
   //! P1: Number of periods with invalid messages.
   //! P2: Maximum invalid message counter.