diff --git a/pkg/homeassistant/structs.go b/pkg/homeassistant/structs.go
index 93f6573..a371798 100644
--- a/pkg/homeassistant/structs.go
+++ b/pkg/homeassistant/structs.go
@@ -90,6 +90,7 @@ var ExtraProps = struct {
 	BrightnessPercent     string
 	BrightnessPercentStep string
 	HvacMode              string
+	FanMode               string
 	Temperature           string
 	TargetTempHigh        string
 	TargetTempLow         string
@@ -101,6 +102,7 @@ var ExtraProps = struct {
 	BrightnessPercent:     "brightness_pct",
 	BrightnessPercentStep: "brightness_step_pct",
 	HvacMode:              "hvac_mode",
+	FanMode:               "fan_mode",
 	Temperature:           "temperature",
 	TargetTempHigh:        "target_temp_high",
 	TargetTempLow:         "target_temp_low",
diff --git a/pkg/homeassistant/thermostat.go b/pkg/homeassistant/thermostat.go
new file mode 100644
index 0000000..1b10154
--- /dev/null
+++ b/pkg/homeassistant/thermostat.go
@@ -0,0 +1,110 @@
+package homeassistant
+
+import (
+	"fmt"
+)
+
+type ThermostatMode string
+
+const ThermostatModeOff ThermostatMode = "off"
+const ThermostatModeHeat ThermostatMode = "heat"
+const ThermostatModeCool ThermostatMode = "cool"
+const ThermostatModeHeatCool ThermostatMode = "heat_cool"
+
+type ThermostatFanMode string
+
+const ThermostatFanModeAuto ThermostatFanMode = "Auto low"
+const ThermostatFanModeLow ThermostatFanMode = "Low"
+
+type ThermostatState struct {
+	Mode           ThermostatMode
+	FanMode        ThermostatFanMode
+	TargetTempHigh float64
+	TargetTempLow  float64
+}
+
+func (c *RestClient) GetThermostatState(entityId string) (output ThermostatState, err error) {
+	output = ThermostatState{
+		Mode: ThermostatModeOff,
+	}
+	state, err := c.GetState(entityId)
+
+	if err != nil {
+		return output, err
+	}
+
+	defer func() {
+		if panicErr := recover(); panicErr != nil {
+			err = fmt.Errorf("error parsing attribute value: %v", panicErr)
+		}
+	}()
+
+	switch state.State {
+	case string(ThermostatModeHeat):
+		output.Mode = ThermostatModeHeat
+		output.TargetTempLow = state.Attributes["temperature"].(float64)
+	case string(ThermostatModeCool):
+		output.Mode = ThermostatModeCool
+		output.TargetTempHigh = state.Attributes["temperature"].(float64)
+	case string(ThermostatModeHeatCool):
+		output.Mode = ThermostatModeHeatCool
+		output.TargetTempHigh = state.Attributes["target_temp_high"].(float64)
+		output.TargetTempLow = state.Attributes["target_temp_low"].(float64)
+	default:
+		output.Mode = ThermostatModeOff
+	}
+
+	switch state.Attributes["fan_mode"].(string) {
+	case string(ThermostatFanModeLow):
+		output.FanMode = ThermostatFanModeLow
+	default:
+		output.FanMode = ThermostatFanModeAuto
+	}
+
+	return output, err
+}
+
+func (c *RestClient) SetThermostatState(entityId string, desiredState ThermostatState) error {
+	if desiredState.Mode == ThermostatModeOff {
+		return c.CallService(entityId, Services.TurnOff)
+	}
+
+	err := c.CallService(entityId, Services.TurnOn)
+	if err != nil {
+		return fmt.Errorf("error turning on thermostat: %w", err)
+	}
+
+	extras := map[string]any{
+		"hvac_mode": string(desiredState.Mode),
+	}
+
+	switch desiredState.Mode {
+	case ThermostatModeCool:
+		extras["temperature"] = desiredState.TargetTempHigh
+	case ThermostatModeHeat:
+		extras["temperature"] = desiredState.TargetTempLow
+	case ThermostatModeHeatCool:
+		extras["target_temp_high"] = desiredState.TargetTempHigh
+		extras["target_temp_low"] = desiredState.TargetTempLow
+	}
+
+	serviceCalls := []*CallServiceInput{{
+		EntityID: entityId, Service: Services.SetTemperature, Extras: extras,
+	}}
+
+	if desiredState.FanMode != "" {
+		serviceCalls = append(serviceCalls, &CallServiceInput{
+			EntityID: entityId, Service: Services.SetFanMode, Extras: map[string]any{
+				ExtraProps.FanMode: string(desiredState.FanMode),
+			},
+		})
+	}
+
+	return c.CallServices(serviceCalls...)
+}
+
+func (c *RestClient) SetThermostatFanMode(entityId string, mode ThermostatFanMode) error {
+	return c.CallService(entityId, Services.SetFanMode, map[string]any{
+		ExtraProps.FanMode: string(mode),
+	})
+}