diff --git a/Integrations/ESPHome/Core.yaml b/Integrations/ESPHome/Core.yaml
index 7562310..e3922fd 100644
--- a/Integrations/ESPHome/Core.yaml
+++ b/Integrations/ESPHome/Core.yaml
@@ -727,10 +727,11 @@ interval:
       - lambda: |-
           uint32_t current_time = millis() / 1000;  // Convert to seconds
           uint32_t last_update = id(ltr390_last_update);
-          uint32_t interval = (uint32_t)id(ltr390_update_interval).state;
+          float configured_interval = id(ltr390_update_interval).state;
+          uint32_t interval = (configured_interval >= 1.0f) ? (uint32_t)configured_interval : 60u;
 
           // Immediate update on boot (when last_update is still 0)
-          if (last_update == 0 && current_time > 0) {
+          if (last_update == 0) {
             id(ltr_390).update();
             id(ltr390_last_update) = current_time;
             return;