diff --git a/fhem/FHEM/10_MAX.pm b/fhem/FHEM/10_MAX.pm
index f512bb109..666236fe3 100755
--- a/fhem/FHEM/10_MAX.pm
+++ b/fhem/FHEM/10_MAX.pm
@@ -659,7 +659,7 @@ MAX_Parse($$)
     my $dstsetting = vec($bits2, 3, 1); #is automatically switching to DST activated
     my $langateway = vec($bits2, 4, 1); #??
     my $panel = vec($bits2, 5, 1); #1 if the heating thermostat is locked for manually setting the temperature at the device
-    my $rferror = vec($bits2, 6, 1); #communication with link partner (what does that mean?)
+    my $rferror = vec($bits2, 6, 1); #communication with link partner - if device is not accessible over the air from the cube
     my $batterylow = vec($bits2, 7, 1); #1 if battery is low
 
     my $untilStr = defined($until3) ? MAX_ParseDateTime($until1,$until2,$until3)->{str} : "";
@@ -687,6 +687,7 @@ MAX_Parse($$)
     readingsBulkUpdate($shash, "battery", $batterylow ? "low" : "ok");
     readingsBulkUpdate($shash, "batteryState", $batterylow ? "low" : "ok"); # Forum #87575
     readingsBulkUpdate($shash, "panel", $panel ? "locked" : "unlocked");
+    readingsBulkUpdate($shash, "rferror", $rferror ? "1" : "0");
     #The formatting of desiredTemperature must match with in MAX_Set:$templist
     #Sometime we get an MAX_Parse MAX,1,ThermostatState,01090d,180000000000, where desiredTemperature is 0 - ignore it
     readingsBulkUpdate($shash, "desiredTemperature", MAX_SerializeTemperature($desiredTemperature)) if($desiredTemperature != 0);
@@ -716,7 +717,7 @@ MAX_Parse($$)
       my $dstsetting = vec($bits2, 3, 1); #is automatically switching to DST activated
       my $langateway = vec($bits2, 4, 1); #??
       my $panel = vec($bits2, 5, 1); #1 if the heating thermostat is locked for manually setting the temperature at the device
-      my $rferror = vec($bits2, 6, 1); #communication with link partner (what does that mean?)
+      my $rferror = vec($bits2, 6, 1); #communication with link partner - if device is not accessible over the air from the cube
       my $batterylow = vec($bits2, 7, 1); #1 if battery is low
 
       my $untilStr = "";
@@ -735,6 +736,7 @@ MAX_Parse($$)
       readingsBulkUpdate($shash, "battery", $batterylow ? "low" : "ok");
       readingsBulkUpdate($shash, "batteryState", $batterylow ? "low" : "ok"); # Forum #87575
       readingsBulkUpdate($shash, "panel", $panel ? "locked" : "unlocked");
+      readingsBulkUpdate($shash, "rferror", $rferror ? "1" : "0");
       readingsBulkUpdate($shash, "displayActualTemperature", ($displayActualTemperature) ? 1 : 0);
     } else {
       Log3 $hash, 2, "Invalid $msgtype packet"
@@ -764,6 +766,7 @@ MAX_Parse($$)
 
     readingsBulkUpdate($shash, "battery", $batterylow ? "low" : "ok");
     readingsBulkUpdate($shash, "batteryState", $batterylow ? "low" : "ok"); # Forum #87575
+    readingsBulkUpdate($shash, "rferror", $rferror ? "1" : "0");
     readingsBulkUpdate($shash,"onoff",$isopen);
 
   }elsif($msgtype eq "PushButtonState") {
@@ -777,6 +780,7 @@ MAX_Parse($$)
     readingsBulkUpdate($shash, "batteryState", $batterylow ? "low" : "ok"); # Forum #87575
     readingsBulkUpdate($shash, "onoff", $onoff);
     readingsBulkUpdate($shash, "connection", $gateway);
+    readingsBulkUpdate($shash, "rferror", $rferror ? "1" : "0");
 
   } elsif(grep /^$msgtype$/, ("HeatingThermostatConfig", "WallThermostatConfig")) {
     readingsBulkUpdate($shash, "ecoTemperature", MAX_SerializeTemperature($args[0]));