diff --git a/CHANGELOG_LATEST.md b/CHANGELOG_LATEST.md
index e0405527a..343aca6e7 100644
--- a/CHANGELOG_LATEST.md
+++ b/CHANGELOG_LATEST.md
@@ -34,3 +34,4 @@ For more details go to [emsesp.org](https://emsesp.org/).
 - fetch telegrams: set length to fetch [#3017](https://github.com/emsesp/EMS-ESP32/issues/3017)
 - move http client from stack to heap
 - heap optimizations [#3021](https://github.com/emsesp/EMS-ESP32/discussions/3021)
+- check and read 0x470 as summer2_typeids[0] only if received [#2686](https://github.com/emsesp/EMS-ESP32/issues/2686), [#3055](https://github.com/emsesp/EMS-ESP32/issues/3055)
diff --git a/src/devices/thermostat.cpp b/src/devices/thermostat.cpp
index ebbb2e686..824897496 100644
--- a/src/devices/thermostat.cpp
+++ b/src/devices/thermostat.cpp
@@ -207,6 +207,7 @@ 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), 1);
         register_telegram_type(0xBF, "ErrorMessage", false, MAKE_PF_CB(process_ErrorMessageBF));
         register_telegram_type(0xC0, "RCErrorMessage", false, MAKE_PF_CB(process_RCErrorMessage2));
+        register_telegram_type(0x470, "RC300Summer2", true, MAKE_PF_CB(process_RC300Summer2), 8);
         EMSESP::send_read_request(0xC0, device_id, 0, 20); // read last errorcode on start (only published on errors)
 
         // JUNKERS/HT3
@@ -1268,7 +1269,13 @@ void Thermostat::process_RC300Summer(std::shared_ptr<const Telegram> telegram) {
 void Thermostat::process_RC300Summer2(std::shared_ptr<const Telegram> telegram) {
     auto hc = heating_circuit(telegram);
     if (hc == nullptr) {
-        return;
+        // telegram 0x470 see https://github.com/emsesp/EMS-ESP32/issues/2686
+        if (telegram->type_id == 0x470 && telegram->message_length > 2) {
+            hc                 = heating_circuit(1);
+            summer2_typeids[0] = 0x470;
+        } else {
+            return;
+        }
     }
     if (hc->statusbyte & 1) {
         has_update(telegram, hc->summersetmode, 0);
diff --git a/src/emsesp_version.h b/src/emsesp_version.h
index c98cd567e..e7b3ea13f 100644
--- a/src/emsesp_version.h
+++ b/src/emsesp_version.h
@@ -1 +1 @@
-#define EMSESP_APP_VERSION "3.8.2-dev.19"
+#define EMSESP_APP_VERSION "3.8.2-dev.20"