diff -r 31b14c9ac625 -r 750f2468dec5 thermferm/thermferm.c
--- a/thermferm/thermferm.c	Sat Mar 05 12:50:23 2016 +0100
+++ b/thermferm/thermferm.c	Fri Mar 11 20:27:02 2016 +0100
@@ -1516,15 +1516,15 @@
 		     */
 		    unit->PID_cool->Mode = unit->PID_heat->Mode = PID_MODE_NONE;
 		    if (unit->mode == UNITMODE_FRIDGE) {
-			unit->PID_cool->SetP = unit->fridge_set;
-			unit->PID_heat->SetP = unit->fridge_set;
+			unit->PID_cool->SetP = unit->fridge_set + unit->PID_cool->idleRange;
+			unit->PID_heat->SetP = unit->fridge_set - unit->PID_heat->idleRange;
 			unit->PID_cool->Input = unit->PID_heat->Input = unit->air_temperature / 1000.0;
 			unit->PID_cool->Mode = unit->PID_heat->Mode = PID_MODE_BOO;
 		    } else if (unit->mode == UNITMODE_BEER) {
 			unit->PID_cool->SetP = unit->beer_set;
 			unit->PID_heat->SetP = unit->beer_set;
 			unit->PID_cool->Input = unit->PID_heat->Input = unit->beer_temperature / 1000.0;
-			unit->PID_cool->Mode = unit->PID_heat->Mode = PID_MODE_BOO;
+			unit->PID_cool->Mode = unit->PID_heat->Mode = PID_MODE_AUTO;
 		    } else if (unit->mode == UNITMODE_PROFILE) {
 			double  usetemp;
 			unit->PID_cool->SetP = unit->prof_target_hi;
@@ -1538,7 +1538,7 @@
 			    fprintf(stdout, " fridge_mode=%d measured=%.3f %.3f => %.3f\n", unit->prof_fridge_mode,
 					    unit->air_temperature / 1000.0, unit->beer_temperature / 1000.0, usetemp);
 			unit->PID_cool->Input = unit->PID_heat->Input = usetemp;
-			unit->PID_cool->Mode = unit->PID_heat->Mode = PID_MODE_BOO;
+			unit->PID_cool->Mode = unit->PID_heat->Mode = PID_MODE_AUTO;
 		    }
 
 		    /*
@@ -1551,19 +1551,31 @@
 		     * Logging
 		     */
 		    if (unit->heater_address) {
+			/*
+			 * Prevent extreme heating
+			 */
+			if ((unit->mode == UNITMODE_BEER) && ((unit->air_temperature / 1000.0) > (unit->PID_heat->Input + 5.0))) {
+			    unit->PID_heat->OutP = 0.0;
+			}
 			if (debug)
 			    fprintf(stdout, "Heat: sp=%.2f Input=%.2f iState=%.2f Err=%.2f Out=%.2f\n",
 				unit->PID_heat->SetP, unit->PID_heat->Input, unit->PID_heat->iState, unit->PID_heat->Err, unit->PID_heat->OutP);
-			if (/* ((unit->PID_heat->OutP >= 2) && unit->heater_address) || */ (seconds == 60) /* || unit->heater_state */) {
+			if (seconds == 60) {
 			    syslog(LOG_NOTICE, "Heat: sp=%.2f Input=%.2f iState=%.2f Err=%.2f Out=%.2f",
 				unit->PID_heat->SetP, unit->PID_heat->Input, unit->PID_heat->iState, unit->PID_heat->Err, unit->PID_heat->OutP);
 			}
 		    }
 		    if (unit->cooler_address) {
+			/*
+			 * Prevent extreme cooling
+			 */
+			if ((unit->mode == UNITMODE_BEER) && ((unit->air_temperature / 1000.0) < (unit->PID_cool->Input - 5.0))) {
+			    unit->PID_cool->OutP = 0.0;
+			}
 		    	if (debug)
 			    fprintf(stdout, "Cool: sp=%.2f Input=%.2f iState=%.2f Err=%.2f Out=%.2f\n",
 				unit->PID_cool->SetP, unit->PID_cool->Input, unit->PID_cool->iState, unit->PID_cool->Err, unit->PID_cool->OutP);
-		    	if (/* ((unit->PID_cool->OutP >= 2) && unit->cooler_address) || */ (seconds == 60) /* || unit->cooler_state*/ ) {
+		    	if (seconds == 60) {
 			    syslog(LOG_NOTICE, "Cool: sp=%.2f Input=%.2f iState=%.2f Err=%.2f Out=%.2f",
 				unit->PID_cool->SetP, unit->PID_cool->Input, unit->PID_cool->iState, unit->PID_cool->Err, unit->PID_cool->OutP);
 		    	}
@@ -1574,11 +1586,15 @@
 		     */
 		    if (unit->PID_cool->OutP && unit->PID_heat->OutP) {
 			syslog(LOG_NOTICE, "Heat and Cool lockdown");
-			unit->PID_cool->OutP = unit->PID_heat->OutP = 0.0;
+			if (unit->PID_cool->OutP > unit->PID_heat->OutP)
+			    unit->PID_heat->OutP = 0.0;
+			else
+			    unit->PID_cool->OutP = 0.0;
+//			unit->PID_cool->OutP = unit->PID_heat->OutP = 0.0;
 		    }
 
 		    if (unit->heater_address && ! unit->cooler_state) {
-			if (unit->PID_heat->OutP >= 2) {
+			if (unit->PID_heat->OutP >= 50) {
 			    if (unit->heater_wait < unit->heater_delay) {
 				unit->heater_wait++;
 			    } else {
@@ -1605,7 +1621,7 @@
 		    }
 
 		    if (unit->cooler_address && ! unit->heater_state) {
-			if (unit->PID_cool->OutP >= 2) {
+			if (unit->PID_cool->OutP >= 50) {
 			    if (unit->cooler_wait < unit->cooler_delay) {
 				unit->cooler_wait++;
 			    } else {
@@ -1630,6 +1646,9 @@
 			else
 			    device_out(unit->cooler_address, 0);
 		    }
+		    if (debug)
+			fprintf(stdout, "Final: PIDheat=%.2f PWRheat=%d  PIDcool=%.2f PWRcool=%d\n", 
+					unit->PID_heat->OutP, unit->heater_state, unit->PID_cool->OutP, unit->cooler_state);
 
 		    if ((unit->heater_address || unit->cooler_address) && unit->fan_address) {
 			/*