diff --git a/src/superio/ite/common/env_ctrl.c b/src/superio/ite/common/env_ctrl.c
index f63bfd3eea..fbf74468b0 100644
--- a/src/superio/ite/common/env_ctrl.c
+++ b/src/superio/ite/common/env_ctrl.c
@@ -113,6 +113,7 @@ static void fan_smartconfig(const u16 base, const u8 fan,
 	u8 pwm_ctrl;
 	u8 pwm_start = 0;
 	u8 pwm_auto = 0;
+	u8 delta_temp;
 
 	if (mode == FAN_SMART_SOFTWARE) {
 		pwm_ctrl = ITE_EC_FAN_CTL_PWM_MODE_SOFTWARE;
@@ -145,8 +146,11 @@ static void fan_smartconfig(const u16 base, const u8 fan,
 		/* Full speed above 127°C by default */
 		pnp_write_hwm5_index(base, ITE_EC_FAN_CTL_TEMP_LIMIT_FULL(fan),
 			conf->tmp_full ? conf->tmp_full : 127);
+
+		delta_temp = ITE_EC_FAN_CTL_DELTA_TEMP_INTRVL(conf->tmp_delta);
+		delta_temp |= ITE_EC_FAN_CTL_FULL_AT_THRML_LMT(conf->full_lmt);
 		pnp_write_hwm5_index(base, ITE_EC_FAN_CTL_DELTA_TEMP(fan),
-			ITE_EC_FAN_CTL_DELTA_TEMP_INTRVL(conf->tmp_delta));
+			delta_temp);
 	}
 
 	pnp_write_hwm5_index(base, ITE_EC_FAN_CTL_PWM_CONTROL(fan), pwm_ctrl);
diff --git a/src/superio/ite/common/env_ctrl.h b/src/superio/ite/common/env_ctrl.h
index e8fb1f5b01..7bce8097f5 100644
--- a/src/superio/ite/common/env_ctrl.h
+++ b/src/superio/ite/common/env_ctrl.h
@@ -185,6 +185,7 @@ static const u8 ITE_EC_TEMP_ADJUST[] = { 0x56, 0x57, 0x59 };
 
 /* Common for ITE_EC_FAN_CTL_DELTA_TEMP */
 #define   ITE_EC_FAN_CTL_DELTA_TEMP_INTRVL(c)	((c) & 0x1f)
+#define   ITE_EC_FAN_CTL_FULL_AT_THRML_LMT(x)   (((x) & 0x1) << 6)
 #define ITE_EC_FAN_CTL_TARGET_ZONE(x)		(0x66 + ((x)-1) * 8)
 #define   ITE_EC_FAN_CTL_TARGET_ZONE_MASK	0x0f
 
diff --git a/src/superio/ite/common/env_ctrl_chip.h b/src/superio/ite/common/env_ctrl_chip.h
index 6a027b90f1..09577a4d84 100644
--- a/src/superio/ite/common/env_ctrl_chip.h
+++ b/src/superio/ite/common/env_ctrl_chip.h
@@ -50,15 +50,16 @@ enum ite_ec_fan_mode {
 };
 
 struct ite_ec_fan_smartconfig {
-	u8 tmpin;	/* select TMPINx (1, 2 or 3)		*/
-	u8 tmp_off;	/* turn fan off below (°C)		*/
-	u8 tmp_start;	/* turn fan on above (°C)		*/
-	u8 tmp_full;	/* 100% duty cycle above (°C)		*/
-	u8 tmp_delta;	/* adapt fan speed when temperature
-			   changed by at least `tmp_delta`°C	*/
-	u8 smoothing;	/* enable smoothing			*/
-	u8 pwm_start;	/* start at this duty cycle (%)		*/
-	u8 slope;	/* increase duty cycle by `slope`%/°C	*/
+	u8 tmpin;	/* select TMPINx (1, 2 or 3)			*/
+	u8 tmp_off;	/* turn fan off below (°C)			*/
+	u8 tmp_start;	/* turn fan on above (°C)			*/
+	u8 tmp_full;	/* 100% duty cycle above (°C)			*/
+	u8 tmp_delta;	/* adapt fan speed when temperature changed by
+			   at least `tmp_delta`°C			*/
+	u8 full_lmt;	/* force fan to full PWM at thermal limit	*/
+	u8 smoothing;	/* enable smoothing				*/
+	u8 pwm_start;	/* start at this duty cycle (%)			*/
+	u8 slope;	/* increase duty cycle by `slope`%/°C		*/
 };
 
 struct ite_ec_fan_config {