diff --git a/selfdrive/thermald/thermald.py b/selfdrive/thermald/thermald.py
index c2e613587..87379e564 100755
--- a/selfdrive/thermald/thermald.py
+++ b/selfdrive/thermald/thermald.py
@@ -156,6 +156,7 @@ def thermald_thread():
   network_type = NetworkType.none
   network_strength = NetworkStrength.unknown
   network_info = None
+  registered_count = 0
 
   current_filter = FirstOrderFilter(0., CURRENT_TAU, DT_TRML)
   cpu_temp_filter = FirstOrderFilter(0., CPU_TEMP_TAU, DT_TRML)
@@ -235,6 +236,15 @@ def thermald_thread():
         network_type = HARDWARE.get_network_type()
         network_strength = HARDWARE.get_network_strength(network_type)
         network_info = HARDWARE.get_network_info()  # pylint: disable=assignment-from-none
+
+        if TICI and (network_info.get('state', None) == "REGISTERED"):
+          registered_count += 1
+        else:
+          registered_count = 0
+
+        if registered_count > 10:
+          cloudlog.warning(f"Modem stuck in registered state {network_info}")
+
       except Exception:
         cloudlog.exception("Error getting network status")