diff --git a/reference/speeduino.ini b/reference/speeduino.ini
index b0f2bfe..eaef156 100644
--- a/reference/speeduino.ini
+++ b/reference/speeduino.ini
@@ -448,10 +448,10 @@ page = 7
         fanPin       = bits  , U08,     56, [2:7], "Board Default", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51", "52", "53", "54", "INVALID", "INVALID", "INVALID", "INVALID", "INVALID", "INVALID", "INVALID", "INVALID", "INVALID"
     #if CELSIUS
         fanSP        = scalar, U08,     57,        "C",        1.0,       -40,     -40,     215.0,    0
-        fanHyster    = scalar, U08,     58,        "C",        1.0,       -40,     -40,     215.0,    0	
+        fanHyster    = scalar, U08,     58,        "C",        1.0,       0.0,  0.0,     40,    0	
     #else
         fanSP        = scalar, U08,     57,        "F",        1.8,       -22.23,  -40,     215.0,    0
-        fanHyster    = scalar, U08,     58,        "F",        1.8,       -22.23,  -40,     215.0,    0	
+        fanHyster    = scalar, U08,     58,        "F",        1.0,       0.0,  0.0,     40,    0	
     #endif
         fanFreq      = scalar, U08 ,    59,        "Hz",        2.0,        0.0,    10,     511,       0
     #if CELSIUS
@@ -519,6 +519,7 @@ page = 9
 [ConstantsExtensions]
     requiresPowerCycle = nCylinders
     requiresPowerCycle = pinLayout
+    requiresPowerCycle = fanPin
     requiresPowerCycle = reqFuel
     requiresPowerCycle = numteeth
     requiresPowerCycle = onetwo