diff --git a/src/devices/boiler.cpp b/src/devices/boiler.cpp
index 411c1fae3..f79f6e919 100644
--- a/src/devices/boiler.cpp
+++ b/src/devices/boiler.cpp
@@ -1059,12 +1059,12 @@ Boiler::Boiler(uint8_t device_type, int8_t device_id, uint8_t product_id, const
     register_device_value(DeviceValueTAG::TAG_DHW1, &wwWorkM_, DeviceValueType::TIME, FL_(wwWorkM), DeviceValueUOM::MINUTES);
 
     // fetch some initial data
-    EMSESP::send_read_request(0x10, device_id); // read last errorcode on start (only published on errors)
-    EMSESP::send_read_request(0x11, device_id); // read last errorcode on start (only published on errors)
-    EMSESP::send_read_request(0x15, device_id); // read maintenance data on start (only published on change)
-    EMSESP::send_read_request(0x1C, device_id); // read maintenance status on start (only published on change)
-    EMSESP::send_read_request(0xC2, device_id); // read last errorcode on start (only published on errors)
-    EMSESP::send_read_request(0xC6, device_id); // read last errorcode on start (only published on errors)
+    EMSESP::send_read_request(0x10, device_id, 0, 11); // read last errorcode on start (only published on errors)
+    EMSESP::send_read_request(0x11, device_id, 0, 11); // read last errorcode on start (only published on errors)
+    EMSESP::send_read_request(0x15, device_id);        // read maintenance data on start (only published on change)
+    EMSESP::send_read_request(0x1C, device_id);        // read maintenance status on start (only published on change)
+    EMSESP::send_read_request(0xC2, device_id, 0, 20); // read last errorcode on start (not broadcasted)
+    EMSESP::send_read_request(0xC6, device_id, 0, 21); // read last errorcode on start (not broadcasted)
 
 
     if (model() != EMSdevice::EMS_DEVICE_FLAG_HEATPUMP && model() != EMSdevice::EMS_DEVICE_FLAG_HIU) {
@@ -1835,8 +1835,8 @@ 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
-    EMSESP::send_read_request(0xC6, device_id()); // read last errorcode
+    EMSESP::send_read_request(0xC2, device_id(), 0, 20); // read last errorcode
+    EMSESP::send_read_request(0xC6, device_id(), 0, 21); // read last errorcode
 }
 
 // 0x10, 0x11
diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index 0a8bf22d2..3ef575291 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -196,7 +196,7 @@ Thermostat::Thermostat(uint8_t device_type, uint8_t device_id, uint8_t product_i
         register_telegram_type(0x16E, "Absent", true, MAKE_PF_CB(process_Absent));
         register_telegram_type(0xBF, "ErrorMessage", false, MAKE_PF_CB(process_ErrorMessageBF));
         register_telegram_type(0xC0, "RCErrorMessage", false, MAKE_PF_CB(process_RCErrorMessage2));
-        EMSESP::send_read_request(0xC0, device_id); // read last errorcode on start (only published on errors)
+        EMSESP::send_read_request(0xC0, device_id, 0, 20); // read last errorcode on start (only published on errors)
 
         // JUNKERS/HT3
     } else if (model == EMSdevice::EMS_DEVICE_FLAG_JUNKERS) {