diff --git a/src/api/config.c b/src/api/config.c
index 91eaaec5..e5820566 100644
--- a/src/api/config.c
+++ b/src/api/config.c
@@ -122,6 +122,8 @@ static cJSON *addJSONvalue(const enum conf_type conf_type, union conf_value *val
 			return cJSON_CreateStringReference(get_listeningMode_str(val->listeningMode));
 		case CONF_ENUM_WEB_THEME:
 			return cJSON_CreateStringReference(get_web_theme_str(val->web_theme));
+		case CONF_ENUM_TEMP_UNIT:
+			return cJSON_CreateStringReference(get_temp_unit_str(val->temp_unit));
 		case CONF_STRUCT_IN_ADDR:
 		{
 			char addr4[INET_ADDRSTRLEN] = { 0 };
@@ -366,6 +368,19 @@ static const char *getJSONvalue(struct conf_item *conf_item, cJSON *elem, struct
 			log_debug(DEBUG_CONFIG, "Set %s to %d", conf_item->k, conf_item->v.web_theme);
 			break;
 		}
+		case CONF_ENUM_TEMP_UNIT:
+		{
+			// Check type
+			if(!cJSON_IsString(elem))
+				return "not of type string";
+			const int temp_unit = get_temp_unit_val(elem->valuestring);
+			if(temp_unit == -1)
+				return "invalid option";
+			// Set item
+			conf_item->v.temp_unit = temp_unit;
+			log_debug(DEBUG_CONFIG, "Set %s to %d", conf_item->k, conf_item->v.temp_unit);
+			break;
+		}
 		case CONF_ENUM_PRIVACY_LEVEL:
 		{
 			// Check type
@@ -514,9 +529,9 @@ static int api_config_get(struct ftl_conn *api)
 
 			// Special case: write-only values
 			if(conf_item->f & FLAG_WRITE_ONLY)
-				JSON_ADD_ITEM_TO_OBJECT(leaf, "value", val);
-			else
 				JSON_REF_STR_IN_OBJECT(leaf, "value", "<write-only property>");
+			else
+				JSON_ADD_ITEM_TO_OBJECT(leaf, "value", val);
 
 			// Add default value
 			cJSON *dval = addJSONvalue(conf_item->t, &conf_item->d);
diff --git a/src/api/info.c b/src/api/info.c
index 7587db83..fe2ec217 100644
--- a/src/api/info.c
+++ b/src/api/info.c
@@ -318,14 +318,14 @@ static int read_hwmon_sensors(struct ftl_conn *api,
 		double temp = 1e-3*raw_temp;
 		double max = 1e-3*raw_max;
 		double crit = 1e-3*raw_crit;
-		if(config.webserver.api.temp.unit.v.s[0] == 'F')
+		if(config.webserver.api.temp.unit.v.temp_unit == TEMP_UNIT_F)
 		{
 			// Convert °Celsius to °Fahrenheit
 			temp = 1.8*temp + 32;
 			max = 1.8*max + 32;
 			crit = 1.8*crit + 32;
 		}
-		else if(config.webserver.api.temp.unit.v.s[0] == 'K')
+		else if(config.webserver.api.temp.unit.v.temp_unit == TEMP_UNIT_K)
 		{
 			// Convert °Celsius to Kelvin
 			temp += 273.15;
@@ -657,9 +657,9 @@ int api_info_sensors(struct ftl_conn *api)
 
 	// Add unit
 	const char *unit = "C";
-	if(config.webserver.api.temp.unit.v.s[0] == 'F')
+	if(config.webserver.api.temp.unit.v.temp_unit == TEMP_UNIT_F)
 		unit = "F";
-	else if(config.webserver.api.temp.unit.v.s[0] == 'K')
+	else if(config.webserver.api.temp.unit.v.temp_unit == TEMP_UNIT_K)
 		unit = "K";
 	JSON_REF_STR_IN_OBJECT(sensors, "unit", unit);
 
diff --git a/src/config/cli.c b/src/config/cli.c
index c8748dbb..d4fa7822 100644
--- a/src/config/cli.c
+++ b/src/config/cli.c
@@ -272,6 +272,21 @@ static bool readStringValue(struct conf_item *conf_item, const char *value, stru
 			}
 			break;
 		}
+		case CONF_ENUM_TEMP_UNIT:
+		{
+			const int temp_unit = get_temp_unit_val(value);
+			if(temp_unit != -1)
+				conf_item->v.temp_unit = temp_unit;
+			else
+			{
+				char *allowed = NULL;
+				CONFIG_ITEM_ARRAY(conf_item->a, allowed);
+				log_err("Config setting %s is invalid, allowed options are: %s", conf_item->k, allowed);
+				free(allowed);
+				return false;
+			}
+			break;
+		}
 		case CONF_STRUCT_IN_ADDR:
 		{
 			struct in_addr addr4 = { 0 };
diff --git a/src/config/config.c b/src/config/config.c
index f649b96a..b0e389b6 100644
--- a/src/config/config.c
+++ b/src/config/config.c
@@ -253,6 +253,7 @@ void duplicate_config(struct config *dst, struct config *src)
 			case CONF_ENUM_PRIVACY_LEVEL:
 			case CONF_ENUM_LISTENING_MODE:
 			case CONF_ENUM_WEB_THEME:
+			case CONF_ENUM_TEMP_UNIT:
 			case CONF_STRUCT_IN_ADDR:
 			case CONF_STRUCT_IN6_ADDR:
 			case CONF_ALL_DEBUG_BOOL:
@@ -288,6 +289,7 @@ bool compare_config_item(const enum conf_type t, const union conf_value *val1, c
 		case CONF_ENUM_PRIVACY_LEVEL:
 		case CONF_ENUM_LISTENING_MODE:
 		case CONF_ENUM_WEB_THEME:
+		case CONF_ENUM_TEMP_UNIT:
 		case CONF_STRUCT_IN_ADDR:
 		case CONF_STRUCT_IN6_ADDR:
 		case CONF_ALL_DEBUG_BOOL:
@@ -343,6 +345,7 @@ void free_config(struct config *conf)
 			case CONF_ENUM_PRIVACY_LEVEL:
 			case CONF_ENUM_LISTENING_MODE:
 			case CONF_ENUM_WEB_THEME:
+			case CONF_ENUM_TEMP_UNIT:
 			case CONF_STRUCT_IN_ADDR:
 			case CONF_STRUCT_IN6_ADDR:
 			case CONF_ALL_DEBUG_BOOL:
@@ -870,7 +873,7 @@ void initConfig(struct config *conf)
 
 	// sub-struct api
 	conf->webserver.api.localAPIauth.k = "webserver.api.localAPIauth";
-	conf->webserver.api.localAPIauth.h = "Does local clients need to authenticate to access the API?";
+	conf->webserver.api.localAPIauth.h = "Do local clients need to authenticate to access the API?";
 	conf->webserver.api.localAPIauth.t = CONF_BOOL;
 	conf->webserver.api.localAPIauth.d.b = true;
 
@@ -930,8 +933,8 @@ void initConfig(struct config *conf)
 		};
 		CONFIG_ADD_ENUM_OPTIONS(conf->webserver.api.temp.unit.a, temp_unit);
 	}
-	conf->webserver.api.temp.unit.t = CONF_STRING;
-	conf->webserver.api.temp.unit.d.s = (char*)"C";
+	conf->webserver.api.temp.unit.t = CONF_ENUM_TEMP_UNIT;
+	conf->webserver.api.temp.unit.d.temp_unit = TEMP_UNIT_C;
 
 
 	// struct files
@@ -1361,6 +1364,7 @@ const char * __attribute__ ((const)) get_conf_type_str(const enum conf_type type
 		case CONF_ENUM_REFRESH_HOSTNAMES:
 		case CONF_ENUM_LISTENING_MODE:
 		case CONF_ENUM_WEB_THEME:
+		case CONF_ENUM_TEMP_UNIT:
 			return "enum (string)";
 		case CONF_STRUCT_IN_ADDR:
 			return "IPv4 address";
diff --git a/src/config/config.h b/src/config/config.h
index 1569738b..506640a1 100644
--- a/src/config/config.h
+++ b/src/config/config.h
@@ -48,6 +48,7 @@ union conf_value {
 	enum debug_flag debug_flag;                 // enum debug_flag value
 	enum listening_mode listeningMode;          // enum listening_mode value
 	enum web_theme web_theme;                   // enum web_theme value
+	enum temp_unit temp_unit;                   // enum temp_unit value
 	struct in_addr in_addr;                     // struct in_addr value
 	struct in6_addr in6_addr;                   // struct in6_addr value
 	cJSON *json;                                // cJSON * value
@@ -71,6 +72,7 @@ enum conf_type {
 	CONF_ENUM_PRIVACY_LEVEL,
 	CONF_ENUM_LISTENING_MODE,
 	CONF_ENUM_WEB_THEME,
+	CONF_ENUM_TEMP_UNIT,
 	CONF_STRUCT_IN_ADDR,
 	CONF_STRUCT_IN6_ADDR,
 	CONF_JSON_STRING_ARRAY,
diff --git a/src/config/toml_helper.c b/src/config/toml_helper.c
index 616b8104..6cd1f6e1 100644
--- a/src/config/toml_helper.c
+++ b/src/config/toml_helper.c
@@ -335,6 +335,9 @@ void writeTOMLvalue(FILE * fp, const int indent, const enum conf_type t, union c
 		case CONF_ENUM_WEB_THEME:
 			printTOMLstring(fp, get_web_theme_str(v->web_theme), toml);
 			break;
+		case CONF_ENUM_TEMP_UNIT:
+			printTOMLstring(fp, get_temp_unit_str(v->temp_unit), toml);
+			break;
 		case CONF_STRUCT_IN_ADDR:
 		{
 			char addr4[INET_ADDRSTRLEN] = { 0 };
@@ -589,6 +592,22 @@ void readTOMLvalue(struct conf_item *conf_item, const char* key, toml_table_t *t
 				log_debug(DEBUG_CONFIG, "%s DOES NOT EXIST or is not of type string", conf_item->k);
 			break;
 		}
+		case CONF_ENUM_TEMP_UNIT:
+		{
+			const toml_datum_t val = toml_string_in(toml, key);
+			if(val.ok)
+			{
+				const int temp_unit = get_temp_unit_val(val.u.s);
+				free(val.u.s);
+				if(temp_unit != -1)
+					conf_item->v.temp_unit = temp_unit;
+				else
+					log_warn("Config setting %s is invalid, allowed options are: %s", conf_item->k, conf_item->h);
+			}
+			else
+				log_debug(DEBUG_CONFIG, "%s DOES NOT EXIST or is not of type string", conf_item->k);
+			break;
+		}
 		case CONF_ENUM_PRIVACY_LEVEL:
 		{
 			const toml_datum_t val = toml_int_in(toml, key);
diff --git a/src/datastructure.c b/src/datastructure.c
index 82043f30..37deb9a6 100644
--- a/src/datastructure.c
+++ b/src/datastructure.c
@@ -1055,4 +1055,31 @@ int __attribute__ ((pure)) get_web_theme_val(const char *web_theme)
 
 	// Invalid value
 	return -1;
-}
\ No newline at end of file
+}
+
+const char * __attribute__ ((const)) get_temp_unit_str(const enum temp_unit temp_unit)
+{
+	switch(temp_unit)
+	{
+		case TEMP_UNIT_C:
+			return "C";
+		case TEMP_UNIT_F:
+			return "F";
+		case TEMP_UNIT_K:
+			return "K";
+	}
+	return NULL;
+}
+
+int __attribute__ ((pure)) get_temp_unit_val(const char *temp_unit)
+{
+	if(strcasecmp(temp_unit, "C") == 0)
+		return TEMP_UNIT_C;
+	else if(strcasecmp(temp_unit, "F") == 0)
+		return TEMP_UNIT_F;
+	else if(strcasecmp(temp_unit, "K") == 0)
+		return TEMP_UNIT_K;
+
+	// Invalid value
+	return -1;
+}
diff --git a/src/datastructure.h b/src/datastructure.h
index a071bc71..73bd8d29 100644
--- a/src/datastructure.h
+++ b/src/datastructure.h
@@ -161,6 +161,8 @@ const char * get_listeningMode_str(const enum listening_mode listeningMode) __at
 int get_listeningMode_val(const char *listeningMode) __attribute__ ((pure));
 const char * __attribute__ ((const)) get_web_theme_str(const enum web_theme web_theme);
 int __attribute__ ((pure)) get_web_theme_val(const char *web_theme);
+const char * __attribute__ ((const)) get_temp_unit_str(const enum temp_unit temp_unit);
+int __attribute__ ((pure)) get_temp_unit_val(const char *temp_unit);
 
 // Pointer getter functions
 #define getQuery(queryID, checkMagic) _getQuery(queryID, checkMagic, __LINE__, __FUNCTION__, __FILE__)
diff --git a/src/enums.h b/src/enums.h
index ff54c1ac..b6f72b7b 100644
--- a/src/enums.h
+++ b/src/enums.h
@@ -301,4 +301,10 @@ enum web_theme {
 	THEME_LCARS
 } __attribute__ ((packed));
 
+enum temp_unit {
+	TEMP_UNIT_C = 0,
+	TEMP_UNIT_F,
+	TEMP_UNIT_K
+} __attribute__ ((packed));
+
 #endif // ENUMS_H
diff --git a/src/setupVars.c b/src/setupVars.c
index 3381f779..cc16368e 100644
--- a/src/setupVars.c
+++ b/src/setupVars.c
@@ -193,9 +193,9 @@ static void get_conf_weblayout_from_setupVars(void)
 static void get_conf_webtheme_from_setupVars(void)
 {
 	// Try to obtain listening mode
-	const char *listeningMode = read_setupVarsconf("WEBTHEME");
+	const char *webTheme = read_setupVarsconf("WEBTHEME");
 
-	if(listeningMode == NULL)
+	if(webTheme == NULL)
 	{
 		// Do not change default value, this value is not set in setupVars.conf
 		log_debug(DEBUG_CONFIG, "setupVars.conf:WEBTHEME -> Not set");
@@ -206,7 +206,7 @@ static void get_conf_webtheme_from_setupVars(void)
 	}
 
 	bool set = false;
-	int web_theme_enum = get_web_theme_val(listeningMode);
+	int web_theme_enum = get_web_theme_val(webTheme);
 	if(web_theme_enum != -1)
 	{
 		set = true;
@@ -230,6 +230,46 @@ static void get_conf_webtheme_from_setupVars(void)
 	}
 }
 
+static void get_conf_temp_unit_from_setupVars(void)
+{
+	// Try to obtain listening mode
+	const char *temp_unit = read_setupVarsconf("TEMPERATURE_UNIT");
+
+	if(temp_unit == NULL)
+	{
+		// Do not change default value, this value is not set in setupVars.conf
+		log_debug(DEBUG_CONFIG, "setupVars.conf:TEMPERATURE_UNIT -> Not set");
+
+		// Free memory, harmless to call if read_setupVarsconf() didn't return a result
+		clearSetupVarsArray();
+		return;
+	}
+
+	bool set = false;
+	int temp_unit_enum = get_temp_unit_val(temp_unit);
+	if(temp_unit_enum != -1)
+	{
+		set = true;
+		config.webserver.api.temp.unit.v.temp_unit = temp_unit_enum;
+	}
+
+	// Free memory, harmless to call if read_setupVarsconf() didn't return a result
+	clearSetupVarsArray();
+
+	if(set)
+	{
+		// Parameter present in setupVars.conf
+		log_debug(DEBUG_CONFIG, "setupVars.conf:TEMPERATURE_UNIT -> Setting %s to %s",
+		          config.webserver.interface.theme.k,
+		          get_temp_unit_str(config.webserver.api.temp.unit.v.temp_unit));
+	}
+	else
+	{
+		// Parameter not present in setupVars.conf
+		log_debug(DEBUG_CONFIG, "setupVars.conf:TEMPERATURE_UNIT -> Not set (found invalid value)");
+	}
+}
+
 static void get_conf_listeningMode_from_setupVars(void)
 {
 	// Try to obtain listening mode
@@ -287,7 +327,7 @@ void importsetupVarsConf(void)
 	get_conf_temp_limit_from_setupVars();
 
 	// Try to obtain password hash from setupVars.conf
-	get_conf_string_from_setupVars("TEMPERATURE_UNIT", &config.webserver.api.temp.unit);
+	get_conf_temp_unit_from_setupVars();
 
 	// Try to obtain web layout
 	get_conf_weblayout_from_setupVars();