diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index cf68370e6..6d3a56efa 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -1019,6 +1019,7 @@ void Thermostat::process_RC300Set(std::shared_ptr<const Telegram> telegram) {
     has_update(telegram, hc->reducetemp, 9);
     has_update(telegram, hc->noreducetemp, 12);
     has_update(telegram, hc->remoteseltemp, 17); // see https://github.com/emsesp/EMS-ESP32/issues/590
+    has_update(telegram, hc->cooling, 28);
 }
 
 // types 0x2AF ff
@@ -1970,6 +1971,20 @@ bool Thermostat::set_wwprio(const char * value, const int8_t id) {
     return true;
 }
 
+// set cooling
+bool Thermostat::set_cooling(const char * value, const int8_t id) {
+    std::shared_ptr<Thermostat::HeatingCircuit> hc = heating_circuit((id == -1) ? AUTO_HEATING_CIRCUIT : id);
+    if (hc == nullptr) {
+        return false;
+    }
+
+    bool b;
+    if (!Helpers::value2bool(value, b)) {
+        return false;
+    }
+    write_command(set_typeids[hc->hc()], 28, b ? 0x01 : 0x00, set_typeids[hc->hc()]);
+    return true;
+}
 
 // sets the thermostat ww circulation working mode, where mode is a string
 bool Thermostat::set_wwcircmode(const char * value, const int8_t id) {
@@ -4178,6 +4193,7 @@ void Thermostat::register_device_values_hc(std::shared_ptr<Thermostat::HeatingCi
         register_device_value(tag, &hc->noreducetemp, DeviceValueType::INT, FL_(noreducetemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_noreducetemp));
         register_device_value(tag, &hc->reducetemp, DeviceValueType::INT, FL_(reducetemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_reducetemp));
         register_device_value(tag, &hc->wwprio, DeviceValueType::BOOL, FL_(wwprio), DeviceValueUOM::NONE, MAKE_CF_CB(set_wwprio));
+        register_device_value(tag, &hc->cooling, DeviceValueType::BOOL, FL_(cooling), DeviceValueUOM::NONE, MAKE_CF_CB(set_cooling));
 
         register_device_value(tag, &hc->hpmode, DeviceValueType::ENUM, FL_(enum_hpmode), FL_(hpmode), DeviceValueUOM::NONE, MAKE_CF_CB(set_hpmode));
         register_device_value(tag, &hc->dewoffset, DeviceValueType::UINT, FL_(dewoffset), DeviceValueUOM::K, MAKE_CF_CB(set_dewoffset));
@@ -4350,7 +4366,7 @@ void Thermostat::register_device_values_hc(std::shared_ptr<Thermostat::HeatingCi
                               MAKE_CF_CB(set_tempautotemp),
                               0,
                               30);
-        register_device_value(tag, &hc->noreducetemp, DeviceValueType::INT, FL_(noreducetemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_noreducetemp), -30, 10);
+        register_device_value(tag, &hc->noreducetemp, DeviceValueType::INT, FL_(noreducetemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_noreducetemp), -31, 10);
         register_device_value(tag, &hc->reducetemp, DeviceValueType::INT, FL_(reducetemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_reducetemp), -20, 10);
         register_device_value(tag, &hc->vacreducetemp, DeviceValueType::INT, FL_(vacreducetemp), DeviceValueUOM::DEGREES, MAKE_CF_CB(set_vacreducetemp), -20, 10);
         register_device_value(
diff --git a/src/devices/thermostat.h b/src/devices/thermostat.h
index b347ac411..6196b41b9 100644
--- a/src/devices/thermostat.h
+++ b/src/devices/thermostat.h
@@ -94,6 +94,7 @@ class Thermostat : public EMSdevice {
         uint8_t roomtempdiff;
         uint8_t hpminflowtemp;
         uint8_t hpmode;
+        uint8_t cooling;
 
         uint8_t hc_num() const {
             return hc_num_;
@@ -565,6 +566,7 @@ class Thermostat : public EMSdevice {
     bool set_dewoffset(const char * value, const int8_t id);
     bool set_hpminflowtemp(const char * value, const int8_t id);
     bool set_hpmode(const char * value, const int8_t id);
+    bool set_cooling(const char * value, const int8_t id);
 };
 
 } // namespace emsesp