diff --git a/cmd/fermentord/gpio.go b/cmd/fermentord/gpio.go
index 94e7b10..0d88e91 100644
--- a/cmd/fermentord/gpio.go
+++ b/cmd/fermentord/gpio.go
@@ -3,12 +3,13 @@ package main
 import (
 	"log"
 
+	"git.joco.dk/sng/fermentord/internal/configuration"
 	"git.joco.dk/sng/fermentord/internal/controllers"
 	"git.joco.dk/sng/fermentord/internal/hw"
 	"git.joco.dk/sng/fermentord/internal/metrics"
 )
 
-func gpioSetState(state controllers.ChamberState, gpio *hw.Gpio) {
+func gpioSetState(state controllers.ChamberState, gpio *hw.Gpio, config *configuration.Configuration) {
 	switch state {
 	case controllers.ChamberStateIdle:
 		log.Printf("Setting chamber state idle")
@@ -20,12 +21,16 @@ func gpioSetState(state controllers.ChamberState, gpio *hw.Gpio) {
 		log.Printf("Setting chamber state cooling")
 		metrics.State.Set(metrics.MetricStateCooling)
 		gpio.StopHeater()
-		gpio.StartCooler()
+		if config.CoolerEnabled {
+			gpio.StartCooler()
+		}
 
 	case controllers.ChamberStateHeating:
 		log.Printf("Setting chamber state heating")
 		metrics.State.Set(metrics.MetricStateHeating)
 		gpio.StopCooler()
-		gpio.StartHeater()
+		if config.HeaterEnabled {
+			gpio.StartHeater()
+		}
 	}
 }
diff --git a/cmd/fermentord/loop.go b/cmd/fermentord/loop.go
index 2ee1397..d874f80 100644
--- a/cmd/fermentord/loop.go
+++ b/cmd/fermentord/loop.go
@@ -111,7 +111,7 @@ func mainLoop(ctx context.Context, wg *sync.WaitGroup, js nats.JetStream, config
 			}
 
 		case state := <-ctrl.C:
-			gpioSetState(state, gpio)
+			gpioSetState(state, gpio, config)
 			ingest.AddState(state)
 			display.SetState(state)
 
diff --git a/internal/configuration/config.go b/internal/configuration/config.go
index 22981dd..20e9b83 100644
--- a/internal/configuration/config.go
+++ b/internal/configuration/config.go
@@ -31,10 +31,11 @@ type Configuration struct {
 		Weight  float64 `mapstructure:"weight"`
 	} `mapstructure:"sensors"`
 
-	FermentationTemperature float64       `mapstructure:"fermentation_temp"`
-	DeltaTemperatureCool    float64       `mapstructure:"delta_temp_cool"`
-	DeltaTemperatureHeat    float64       `mapstructure:"delta_temp_heat"`
-	HeaterDutyCycle         time.Duration `mapstructure:"heater_duty_cycle"`
+	FermentationTemperature float64 `mapstructure:"fermentation_temp"`
+	DeltaTemperatureCool    float64 `mapstructure:"delta_temp_cool"`
+	DeltaTemperatureHeat    float64 `mapstructure:"delta_temp_heat"`
+	HeaterEnabled           bool    `mapstructure:"heater_enabled"`
+	CoolerEnabled           bool    `mapstructure:"cooler_enabled"`
 
 	Limits struct {
 		MinChamberTemperature float64 `mapstructure:"min_chamber_temp"`
@@ -56,7 +57,8 @@ func LoadConfiguration() *Configuration {
 	hub := sentry.CurrentHub().Clone()
 	defer hub.Flush(10 * time.Second)
 
-	viper.SetDefault("heater_duty_cycle", 1*time.Second)
+	viper.SetDefault("cooler_enabled", true)
+	viper.SetDefault("heater_enabled", true)
 	viper.SetDefault("http.port", 8000)
 	viper.SetDefault("nats.stream", "DWJONDAHL")
 	viper.SetDefault("nats.subject.event", "DWJONDAHL.ingest.fermentor.ingest_event")