diff --git a/lib/CustomOpenTherm/CustomOpenTherm.h b/lib/CustomOpenTherm/CustomOpenTherm.h
index 5c16962..cb9b08a 100644
--- a/lib/CustomOpenTherm/CustomOpenTherm.h
+++ b/lib/CustomOpenTherm/CustomOpenTherm.h
@@ -79,7 +79,7 @@ public:
     }
   }
 
-  unsigned long setBoilerStatus(bool enableCentralHeating, bool enableHotWater, bool enableCooling, bool enableOutsideTemperatureCompensation, bool enableCentralHeating2, bool summerWinterMode, bool dhwBlocking) {
+  unsigned long setBoilerStatus(bool enableCentralHeating, bool enableHotWater, bool enableCooling, bool enableOutsideTemperatureCompensation, bool enableCentralHeating2, bool summerWinterMode, bool dhwBlocking, uint8_t lb = 0) {
     unsigned int data = enableCentralHeating
       | (enableHotWater << 1)
       | (enableCooling << 2)
@@ -87,7 +87,9 @@ public:
       | (enableCentralHeating2 << 4)
       | (summerWinterMode << 5)
       | (dhwBlocking << 6);
+    
     data <<= 8;
+    data |= lb;
 
     return this->sendRequest(buildRequest(
       OpenThermMessageType::READ_DATA,
diff --git a/src/OpenThermTask.h b/src/OpenThermTask.h
index c136de8..3c58da9 100644
--- a/src/OpenThermTask.h
+++ b/src/OpenThermTask.h
@@ -165,6 +165,16 @@ protected:
       heatingCh2Enabled = settings.opentherm.dhwPresent && settings.dhw.enable;
     }
 
+    // Set boiler status LB
+    // Some boilers require this, although this is against protocol
+    uint8_t statusLb = 0;
+
+    // Immergas fix
+    // https://arduino.ru/forum/programmirovanie/termostat-opentherm-na-esp8266?page=15#comment-649392
+    if (settings.opentherm.immergasFix) {
+      statusLb = 0xCA;
+    }
+
     unsigned long response = this->instance->setBoilerStatus(
       heatingEnabled,
       settings.opentherm.dhwPresent && settings.dhw.enable,
@@ -172,7 +182,8 @@ protected:
       settings.opentherm.nativeHeatingControl,
       heatingCh2Enabled,
       settings.opentherm.summerWinterMode,
-      settings.opentherm.dhwBlocking
+      settings.opentherm.dhwBlocking,
+      statusLb
     );
 
     if (!CustomOpenTherm::isValidResponse(response)) {
diff --git a/src/Settings.h b/src/Settings.h
index 75d8d37..dba3e78 100644
--- a/src/Settings.h
+++ b/src/Settings.h
@@ -63,6 +63,7 @@ struct Settings {
     bool modulationSyncWithHeating = false;
     bool getMinMaxTemp = true;
     bool nativeHeatingControl = false;
+    bool immergasFix = false;
   } opentherm;
 
   struct {
diff --git a/src/utils.h b/src/utils.h
index 8b63434..b966f94 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -354,6 +354,7 @@ void settingsToJson(const Settings& src, JsonVariant dst, bool safe = false) {
     dst["opentherm"]["modulationSyncWithHeating"] = src.opentherm.modulationSyncWithHeating;
     dst["opentherm"]["getMinMaxTemp"] = src.opentherm.getMinMaxTemp;
     dst["opentherm"]["nativeHeatingControl"] = src.opentherm.nativeHeatingControl;
+    dst["opentherm"]["immergasFix"] = src.opentherm.immergasFix;
 
     dst["mqtt"]["enable"] = src.mqtt.enable;
     dst["mqtt"]["server"] = src.mqtt.server;
@@ -800,6 +801,15 @@ bool jsonToSettings(const JsonVariantConst src, Settings& dst, bool safe = false
       }
     }
 
+    if (src["opentherm"]["immergasFix"].is<bool>()) {
+      bool value = src["opentherm"]["immergasFix"].as<bool>();
+
+      if (value != dst.opentherm.immergasFix) {
+        dst.opentherm.immergasFix = value;
+        changed = true;
+      }
+    }
+
 
     // mqtt
     if (src["mqtt"]["enable"].is<bool>()) {
diff --git a/src_data/locales/en.json b/src_data/locales/en.json
index 9b1af14..d4595fc 100644
--- a/src_data/locales/en.json
+++ b/src_data/locales/en.json
@@ -269,7 +269,8 @@
           "dhwToCh2": "Duplicate DHW to CH2",
           "dhwBlocking": "DHW blocking",
           "modulationSyncWithHeating": "Sync modulation with heating",
-          "getMinMaxTemp": "Get min/max temp from boiler"
+          "getMinMaxTemp": "Get min/max temp from boiler",
+          "immergasFix": "Fix for Immergas boilers"
         },
 
         "faultState": {
diff --git a/src_data/locales/ru.json b/src_data/locales/ru.json
index 3aebdab..0637077 100644
--- a/src_data/locales/ru.json
+++ b/src_data/locales/ru.json
@@ -269,7 +269,8 @@
           "dhwToCh2": "Дублировать параметры ГВС в канал 2",
           "dhwBlocking": "DHW blocking",
           "modulationSyncWithHeating": "Синхронизировать модуляцию с отоплением",
-          "getMinMaxTemp": "Получать мин. и макс. температуру от котла"
+          "getMinMaxTemp": "Получать мин. и макс. температуру от котла",
+          "immergasFix": "Фикс для котлов Immergas"
         },
 
         "faultState": {
diff --git a/src_data/pages/settings.html b/src_data/pages/settings.html
index 5992dc3..f9e2668 100644
--- a/src_data/pages/settings.html
+++ b/src_data/pages/settings.html
@@ -443,6 +443,11 @@
                   <span data-i18n>settings.ot.options.getMinMaxTemp</span>
                 </label>
 
+                <label for="opentherm-immergas-fix"></label>
+                  <input type="checkbox" id="opentherm-immergas-fix" name="opentherm[immergasFix]" value="true">
+                  <span data-i18n>settings.ot.options.immergasFix</span>
+                </label>
+
                 <hr />
                 <fieldset>
                   <label for="opentherm-fault-state-gpio">
@@ -736,6 +741,7 @@
           setCheckboxValue('#opentherm-sync-modulation-with-heating', data.opentherm.modulationSyncWithHeating);
           setCheckboxValue('#opentherm-get-min-max-temp', data.opentherm.getMinMaxTemp);
           setCheckboxValue('#opentherm-native-heating-control', data.opentherm.nativeHeatingControl);
+          setCheckboxValue('#opentherm-immergas-fix', data.opentherm.immergasFix);
           setBusy('#opentherm-settings-busy', '#opentherm-settings', false);
 
           // MQTT