diff --git a/src/devices/boiler.cpp b/src/devices/boiler.cpp
index f52c5fd3d..462bcbbaa 100644
--- a/src/devices/boiler.cpp
+++ b/src/devices/boiler.cpp
@@ -48,6 +48,7 @@ Boiler::Boiler(uint8_t device_type, int8_t device_id, uint8_t product_id, const
 
     // the telegram handlers...
     // common for all boilers
+    register_telegram_type(0xBF, F("ErrorMessage"), false, MAKE_PF_CB(process_ErrorMessage));
     register_telegram_type(0x10, F("UBAErrorMessage1"), false, MAKE_PF_CB(process_UBAErrorMessage));
     register_telegram_type(0x11, F("UBAErrorMessage2"), false, MAKE_PF_CB(process_UBAErrorMessage));
     register_telegram_type(0xC2, F("UBAErrorMessage3"), false, MAKE_PF_CB(process_UBAErrorMessage2));
@@ -872,6 +873,11 @@ void Boiler::process_UBAMaintenanceStatus(std::shared_ptr<const Telegram> telegr
     }
 }
 
+// 0xBF
+void Boiler::process_ErrorMessage(std::shared_ptr<const Telegram> telegram) {
+    EMSESP::send_read_request(0xC2, device_id()); // read last errorcode
+}
+
 // 0x10, 0x11
 void Boiler::process_UBAErrorMessage(std::shared_ptr<const Telegram> telegram) {
     if (telegram->offset > 0 || telegram->message_length < 11) {
diff --git a/src/devices/boiler.h b/src/devices/boiler.h
index a6e90b44f..d83821457 100644
--- a/src/devices/boiler.h
+++ b/src/devices/boiler.h
@@ -210,6 +210,7 @@ class Boiler : public EMSdevice {
     void process_MC110Status(std::shared_ptr<const Telegram> telegram);
     void process_UBAMaintenanceStatus(std::shared_ptr<const Telegram> telegram);
     void process_UBAMaintenanceData(std::shared_ptr<const Telegram> telegram);
+    void process_ErrorMessage(std::shared_ptr<const Telegram> telegram);
     void process_UBAErrorMessage(std::shared_ptr<const Telegram> telegram);
     void process_UBAErrorMessage2(std::shared_ptr<const Telegram> telegram);
     void process_UBAMonitorWWPlus(std::shared_ptr<const Telegram> telegram);
diff --git a/src/emsdevice.cpp b/src/emsdevice.cpp
index 7236f74ae..00c05b64d 100644
--- a/src/emsdevice.cpp
+++ b/src/emsdevice.cpp
@@ -858,11 +858,16 @@ void EMSdevice::reset_entity_masks() {
 // disable/exclude/mask_out a device entity based on the id
 void EMSdevice::mask_entity(const std::string & entity_id) {
     // first character contains mask flags
-    uint8_t flag = Helpers::hextoint(entity_id.substr(0, 2).c_str());
+    uint8_t flag = (Helpers::hextoint(entity_id.substr(0, 2).c_str()) << 4);
     for (auto & dv : devicevalues_) {
         std::string entity = dv.tag < DeviceValueTAG::TAG_HC1 ? read_flash_string(dv.short_name) : tag_to_string(dv.tag) + "/" + read_flash_string(dv.short_name);
         if (entity == entity_id.substr(2)) {
-            dv.state = (dv.state & 0x0F) | (flag << 4); // set state high bits to flag, turn off active and ha flags
+            // remove ha config on change of dv_readonly flag
+            if (Mqtt::ha_enabled() && ((dv.state ^ flag) & DeviceValueState::DV_READONLY)) {
+                dv.remove_state(DeviceValueState::DV_HA_CONFIG_CREATED);
+                Mqtt::publish_ha_sensor_config(dv, "", "", true); // delete topic (remove = true)
+            }
+            dv.state = (dv.state & 0x0F) | flag; // set state high bits to flag
             return;
         }
     }
diff --git a/src/emsdevicevalue.h b/src/emsdevicevalue.h
index 5b8c358ea..dee8f3570 100644
--- a/src/emsdevicevalue.h
+++ b/src/emsdevicevalue.h
@@ -114,7 +114,7 @@ class DeviceValue {
         DV_DEFAULT           = 0,        // 0 - does not yet have a value
         DV_ACTIVE            = (1 << 0), // 1 - has a validated real value
         DV_HA_CONFIG_CREATED = (1 << 1), // 2 - set if the HA config topic has been created
-        DV_HA_CLIMATE_NO_RT  = (1 << 2), // 3 - climate created without roomTemp
+        DV_HA_CLIMATE_NO_RT  = (1 << 2), // 4 - climate created without roomTemp
 
         // high nibble as mask for exclusions & special functions
         DV_WEB_EXCLUDE      = (1 << 4), // 16 - not shown on web