diff --git a/Release/Duet-0.6-0.8.5/Edge/RepRapFirmware-1.16rc2.bin b/Release/Duet-0.6-0.8.5/Edge/RepRapFirmware-1.16rc3.bin
similarity index 66%
rename from Release/Duet-0.6-0.8.5/Edge/RepRapFirmware-1.16rc2.bin
rename to Release/Duet-0.6-0.8.5/Edge/RepRapFirmware-1.16rc3.bin
index 988f2f0150..f7f897535d 100644
Binary files a/Release/Duet-0.6-0.8.5/Edge/RepRapFirmware-1.16rc2.bin and b/Release/Duet-0.6-0.8.5/Edge/RepRapFirmware-1.16rc3.bin differ
diff --git a/src/Configuration.h b/src/Configuration.h
index 26982b4f33..9d809ed4c9 100644
--- a/src/Configuration.h
+++ b/src/Configuration.h
@@ -26,11 +26,11 @@ Licence: GPL
 // Firmware name is now defined in the Pins file
 
 #ifndef VERSION
-# define VERSION "1.16rc2"
+# define VERSION "1.16rc3"
 #endif
 
 #ifndef DATE
-# define DATE "2016-11-05"
+# define DATE "2016-11-06"
 #endif
 
 #define AUTHORS "reprappro, dc42, zpl, t3p3, dnewman"
diff --git a/src/Heating/FOPDT.cpp b/src/Heating/FOPDT.cpp
index 1e94344325..f68b463907 100644
--- a/src/Heating/FOPDT.cpp
+++ b/src/Heating/FOPDT.cpp
@@ -7,13 +7,26 @@
 
 #include "FOPDT.h"
 #include "Core.h"
+#include "Configuration.h"
+
+FopDt::FopDt()
+{
+	// Heater 6 on the Duet 0.8.5 is disabled by default at startup so that we can use fan 2.
+	// Set up sensible defaults in case the user enables the heater without specifying values for all the parameters.
+	enabled = false;
+	gain = DefaultHotEndHeaterGain;
+	timeConstant = DefaultHotEndHeaterTimeConstant;
+	deadTime = DefaultHotEndHeaterDeadTime;
+	maxPwm = 1.0;
+	usePid = true;
+}
 
 // Check the model parameters are sensible, if they are then save them and return true.
 bool FopDt::SetParameters(float pg, float ptc, float pdt, float pMaxPwm, bool pUsePid)
 {
 	if (pg == -1.0 && ptc == -1.0 && pdt == -1.0)
 	{
-		// Setting all parameters to -1 disabled the heater control completely so we can use the pin for other purposes
+		// Setting all parameters to -1 disables the heater control completely so we can use the pin for other purposes
 		enabled = false;
 		return true;
 	}
diff --git a/src/Heating/FOPDT.h b/src/Heating/FOPDT.h
index 8c6a860eb7..55757331f6 100644
--- a/src/Heating/FOPDT.h
+++ b/src/Heating/FOPDT.h
@@ -20,6 +20,8 @@ struct PidParams
 class FopDt
 {
 public:
+	FopDt();
+
 	bool SetParameters(float pg, float ptc, float pdt, float pMaxPwm, bool pUsePid);
 
 	float GetGain() const { return gain; }
diff --git a/src/Platform.h b/src/Platform.h
index e80704d2b6..e5ce5480bd 100644
--- a/src/Platform.h
+++ b/src/Platform.h
@@ -973,7 +973,7 @@ class Platform
 		AnalogOut(pin, pwm, freq);
 	}
 #else
-	AnalogOut(pin, pwm);
+	AnalogOut(pin, pwm, freq);
 #endif
 }