diff --git a/plugins/dynamix/nchan/update_2 b/plugins/dynamix/nchan/update_2
index 644208634..af66d1414 100755
--- a/plugins/dynamix/nchan/update_2
+++ b/plugins/dynamix/nchan/update_2
@@ -159,8 +159,8 @@ function device_temp(&$disk, &$red, &$orange) {
   global $display;
   $spin = strpos($disk['color'],'blink')===false;
   $temp = $disk['temp'];
-  $hot = $disk['hotTemp'] ?? $display['hot'];
-  $max = $disk['maxTemp'] ?? $display['max'];
+  $hot = $disk['hotTemp'] ?? $display['hot'] ?? 0;
+  $max = $disk['maxTemp'] ?? $display['max'] ?? 0;
   $top = $display['top'] ?? 120;
   $heat = false; $color = 'green';
   if (exceed($temp,$max,$top)) {
@@ -299,9 +299,9 @@ while (true) {
   $echo[0] .= array_group('Data');
   $echo[0] .= "\0".($error+$warning)."\0".($red+$orange)."\0".($fail+$smart)."\0".($full+$high);
   //pool devices
-  $error = $warning = $red = $orange = $fail = $smart = $full = $high = 0;
   $echo[1] = '';
   foreach (pools_filter($disks) as $pool) if ($disks[$pool]['devices']) {
+    $error = $warning = $red = $orange = $fail = $smart = $full = $high = 0;
     $echo[1] .= array_group('Cache',$pool);
     $echo[1] .= "\0".($error+$warning)."\0".($red+$orange)."\0".($fail+$smart)."\0".($full+$high)."\r";
   }