diff --git a/docs/API.md b/docs/API.md
index 49a5e67..a02c840 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -641,4 +641,14 @@ Request:
 
 Temperature sensor config entries now include `weather: true`.
 
-When a configured temp sensor has `weather: true`, the WebUI may show it as the outside/weather temperature badge. The `/status` temp objects also include this flag so HTTP, UART, USB serial, and future Pico clients can identify the selected outside-air sensor without guessing from the sensor name.\n
\ No newline at end of file
+When a configured temp sensor has `weather: true`, the WebUI may show it as the outside/weather temperature badge. The `/status` temp objects also include this flag so HTTP, UART, USB serial, and future Pico clients can identify the selected outside-air sensor without guessing from the sensor name.\n\n\n### Clear temperature assignments
+
+`POST /temps/clear`
+
+Request body options:
+
+- `{ "id": "temp_1" }` clears one logical temp slot by ID.
+- `{ "slot": 1 }` clears one logical temp slot by number.
+- Empty POST body clears all temp assignments.
+
+Clearing removes the stored DS18B20 address, disables the slot, clears the weather flag, resets cached temperature state, and persists config.\n
\ No newline at end of file
diff --git a/docs/project-state.md b/docs/project-state.md
index f370914..dc8156e 100644
--- a/docs/project-state.md
+++ b/docs/project-state.md
@@ -163,4 +163,4 @@ Examples:
 5. Add config backup/restore.
 6. Improve BMS out-of-range behavior without changing NimBLE connect timeout.
 
-- Fixed WebUI temperature probe scan by registering `/temps/scan`, `/temps/assign`, and `/temps/clear` firmware routes.\n\n- Added per-temperature-sensor `weather` flag and WebUI outside temperature badge with emoji thresholds: below 50°F ice, 50-74°F happy, 75-84°F sun, and 85°F+ fire.\n\n- Improved WebUI temperature sensor config checkbox layout with compact On/Weather controls.\n\n- Temperature probe assignment now enforces one logical slot per physical DS18B20 address; assigning a probe to a new slot clears the old slot mapping.\n\n- Added per-slot WebUI Clear buttons for temperature probe assignments using the existing `/temps/clear` API.\n\n- Fixed weather temp checkbox persistence by saving the `weather` flag from WebUI temp config and auto-saving checkbox changes.\n\n- Fixed temperature assignment clearing so Clear removes the stored DS18B20 address, disables the slot, clears weather flag, and resets cached temp state.\n
\ No newline at end of file
+- Fixed WebUI temperature probe scan by registering `/temps/scan`, `/temps/assign`, and `/temps/clear` firmware routes.\n\n- Added per-temperature-sensor `weather` flag and WebUI outside temperature badge with emoji thresholds: below 50°F ice, 50-74°F happy, 75-84°F sun, and 85°F+ fire.\n\n- Improved WebUI temperature sensor config checkbox layout with compact On/Weather controls.\n\n- Temperature probe assignment now enforces one logical slot per physical DS18B20 address; assigning a probe to a new slot clears the old slot mapping.\n\n- Added per-slot WebUI Clear buttons for temperature probe assignments using the existing `/temps/clear` API.\n\n- Fixed weather temp checkbox persistence by saving the `weather` flag from WebUI temp config and auto-saving checkbox changes.\n\n- Fixed temperature assignment clearing so Clear removes the stored DS18B20 address, disables the slot, clears weather flag, and resets cached temp state.\n\n- Hardened `/temps/clear` so clearing a temp slot removes the persisted DS18B20 address, disables the slot, clears weather flag, resets cached temp state, and supports clearing all slots with an empty POST body.\n
\ No newline at end of file
diff --git a/firmware/esp32/overland-controller/overland-controller.ino b/firmware/esp32/overland-controller/overland-controller.ino
index ed11e68..e4de0b3 100644
--- a/firmware/esp32/overland-controller/overland-controller.ino
+++ b/firmware/esp32/overland-controller/overland-controller.ino
@@ -2179,8 +2179,24 @@ void handleTempAssign() {
 }
 
 void handleTempClear() {
+    String body = server.arg("plain");
+
+    if (body.length() == 0) {
+        for (int i = 0; i < MAX_TEMP_SENSORS; i++) {
+            appConfig.tempSensors[i].address = "";
+            appConfig.tempSensors[i].enabled = false;
+            appConfig.tempSensors[i].weather = false;
+            sensors.tempsF[i] = -127.0;
+            sensors.online[i] = false;
+        }
+
+        saveConfig();
+        sendConfigJson();
+        return;
+    }
+
     DynamicJsonDocument doc(512);
-    DeserializationError error = deserializeJson(doc, server.arg("plain"));
+    DeserializationError error = deserializeJson(doc, body);
 
     if (error) {
         server.send(400, "application/json", "{\"ok\":false,\"error\":\"invalid_json\"}");
@@ -2203,10 +2219,11 @@ void handleTempClear() {
         return;
     }
 
-    if (!clearTempSensor(configIndex)) {
-        server.send(400, "application/json", "{\"ok\":false,\"error\":\"unknown_temp_sensor\"}");
-        return;
-    }
+    appConfig.tempSensors[configIndex].address = "";
+    appConfig.tempSensors[configIndex].enabled = false;
+    appConfig.tempSensors[configIndex].weather = false;
+    sensors.tempsF[configIndex] = -127.0;
+    sensors.online[configIndex] = false;
 
     saveConfig();
     sendConfigJson();