diff --git a/components/pid/temp_controller_base.py b/components/pid/temp_controller_base.py
index 0be2f7f..24daade 100644
--- a/components/pid/temp_controller_base.py
+++ b/components/pid/temp_controller_base.py
@@ -4,7 +4,14 @@ import enum
 
 DEFAULT_THRESHOLDS = {
 	"HoldHeat": 1.0,
-	"HoldCool": 0.1,
+	# HoldCool used to be 0.1 ("eagerly give up and coast" made sense back
+	# when COOL meant nothing more than going idle - it's an active state
+	# with its own PID now, so a threshold this tight relative to a real
+	# heater's discrete power steps/sensor noise causes the system to
+	# chatter in and out of it every tick, resetting both pid_hold's and
+	# pid_cool's integrators each time and never letting either actually
+	# converge. Symmetric with the others instead.
+	"HoldCool": 1.0,
 	"HeatHold": 1.0,
 	"HeatCool": 1.0,
 	"CoolHold": 1.0,
diff --git a/config.json.templ b/config.json.templ
index 15430d1..8167304 100644
--- a/config.json.templ
+++ b/config.json.templ
@@ -30,7 +30,7 @@
 		},
 		"Thresholds": {
 			"HoldHeat": 1.0,
-			"HoldCool": 0.1,
+			"HoldCool": 1.0,
 			"HeatHold": 1.0,
 			"HeatCool": 1.0,
 			"CoolHold": 1.0,