diff -r ffc4b8aa824f -r 1f89da6511a9 thermferm/thermferm.c
--- a/thermferm/thermferm.c	Wed Apr 01 15:56:04 2015 +0200
+++ b/thermferm/thermferm.c	Wed Apr 01 17:28:26 2015 +0200
@@ -1436,16 +1436,28 @@
 		    if ((unit->heater_address || unit->cooler_address) && unit->fan_address) {
 			/*
 			 * If there is a heater or cooler and we have a fan, turn fan on if
-			 * cooling or heating.
+			 * cooling or heating. The Fan has a start/stop delay.
 			 */
 			if ((unit->heater_address && unit->heater_state) || (unit->cooler_address && unit->cooler_state)) {
-			    if (! unit->fan_state)
-				syslog(LOG_NOTICE, "Fan Off => On");
-			    unit->fan_state = 100;
+			    if (unit->fan_wait < unit->fan_delay) {
+				unit->fan_wait++;
+				syslog(LOG_NOTICE, "fan_wait + %d/%d", unit->fan_wait, unit->fan_delay);
+			    } else {
+				if (! unit->fan_state) {
+				    syslog(LOG_NOTICE, "Fan Off => On");
+			    	    unit->fan_state = 100;
+				}
+			    }
 			} else {
-			    if (unit->fan_state)
-				syslog(LOG_NOTICE, "Fan On => Off");
-			    unit->fan_state = 0;
+			    if (unit->fan_wait > 0) {
+				unit->fan_wait--;
+				syslog(LOG_NOTICE, "fan_wait - %d/%d", unit->fan_wait, unit->fan_delay);
+			    } else {
+			    	if (unit->fan_state) {
+				    syslog(LOG_NOTICE, "Fan On => Off");
+			    	    unit->fan_state = 0;
+				}
+			    }
 			}
 			device_out(unit->fan_address, unit->fan_state);
 		    }
@@ -1454,8 +1466,8 @@
 		    P_err = 0.0;
 		    unit->PID_iState = 0.0;
 		    unit->PID_dState = 0.0;
-		}
-	    }
+		} /* fridge beer or profile mode */
+	    } /* for units */
 
 #ifdef HAVE_WIRINGPI_H
 	    piLock(LOCK_MENU);