diff --git a/auxiliaries.ino b/auxiliaries.ino
new file mode 100644
index 00000000..34756865
--- /dev/null
+++ b/auxiliaries.ino
@@ -0,0 +1,22 @@
+/*
+Speeduino - Simple engine management for the Arduino Mega 2560 platform
+Copyright (C) Josh Stewart
+A full copy of the license may be found in the projects root directory
+*/
+
+/*
+These functions control the auxillary outputs
+*/
+
+void initialiseFan()
+{
+if(configPage4.FanInv == 1) {FanHIGH = LOW, FanLOW = HIGH; }
+else {FanHIGH = HIGH, FanLOW = LOW;}
+digitalWrite(pinFan, FanLOW);         //Initiallise program with the fan in the off state
+}
+
+void FanControl()
+{
+   if (currentStatus.coolant >= (configPage4.FanSP - CALIBRATION_TEMPERATURE_OFFSET)) {digitalWrite(pinFan,FanHIGH);}
+    else if (currentStatus.coolant <= (configPage4.FanSP - configPage4.FanHyster)){ digitalWrite(pinFan, FanLOW);}
+}