diff -r 7b0f819a3805 -r 8448fcf3d799 thermferm/rdconfig.c
--- a/thermferm/rdconfig.c	Mon Feb 16 19:52:42 2015 +0100
+++ b/thermferm/rdconfig.c	Mon Feb 16 20:41:09 2015 +0100
@@ -933,7 +933,7 @@
     unit->idle_rangeL = -1.0;
     unit->prof_started = unit->prof_paused = unit->prof_primary_done = (time_t)0;
     unit->prof_percent = 0;
-    unit->PID_err_old = unit->PID_I_err = unit->PID_Kp = unit->PID_Kd = unit->PID_Ki = 0.0;
+    unit->PID_dState = unit->PID_iState = unit->PID_Kp = unit->PID_Kd = unit->PID_Ki = 0.0;
 
     cur = cur->xmlChildrenNode;
     while (cur != NULL) {