diff --git a/de_react_auto b/de_react_auto
index b3b6b72..fc1cfed 100644
--- a/de_react_auto
+++ b/de_react_auto
@@ -266,11 +266,15 @@ local function updateReactorInfo()
     end
 
     -- Check for zero max values (would cause division by zero)
-    if reactorInfo.maxFieldStrength ~= nil and reactorInfo.maxFieldStrength <= 0 then
-        table.insert(fieldErrors, "maxFieldStrength <= 0")
-    end
-    if reactorInfo.maxEnergySaturation ~= nil and reactorInfo.maxEnergySaturation <= 0 then
-        table.insert(fieldErrors, "maxEnergySaturation <= 0")
+    -- Only flag as error if reactor is not offline (these are expected to be 0 when cold)
+    local isOffline = reactorInfo.status == "cold" or reactorInfo.status == "invalid"
+    if not isOffline then
+        if reactorInfo.maxFieldStrength ~= nil and reactorInfo.maxFieldStrength <= 0 then
+            table.insert(fieldErrors, "maxFieldStrength <= 0")
+        end
+        if reactorInfo.maxEnergySaturation ~= nil and reactorInfo.maxEnergySaturation <= 0 then
+            table.insert(fieldErrors, "maxEnergySaturation <= 0")
+        end
     end
 
     -- Set error message if we have field errors