diff --git a/tasmota/xsns_69_opentherm.ino b/tasmota/xsns_69_opentherm.ino
index 9ea2ed9f2..9df92742d 100644
--- a/tasmota/xsns_69_opentherm.ino
+++ b/tasmota/xsns_69_opentherm.ino
@@ -313,6 +313,8 @@ void sns_ot_start_handshake()
 
     AddLog(LOG_LEVEL_DEBUG, PSTR("[OTH]: perform handshake"));
 
+    sns_opentherm_protocol_reset();
+
     sns_ot_master->sendRequestAync(
         OpenTherm::buildRequest(OpenThermMessageType::READ_DATA, OpenThermMessageID::SConfigSMemberIDcode, 0));
 
diff --git a/tasmota/xsns_69_opentherm_protocol.ino b/tasmota/xsns_69_opentherm_protocol.ino
index f08d6b8a6..ce103ce3d 100644
--- a/tasmota/xsns_69_opentherm_protocol.ino
+++ b/tasmota/xsns_69_opentherm_protocol.ino
@@ -438,4 +438,16 @@ void sns_opentherm_dump_telemetry()
         add_coma = true;
     }
 }
+
+void sns_opentherm_protocol_reset()
+{
+    sns_opentherm_current_command = SNS_OT_COMMANDS_COUNT;
+    for (int i = 0; i < SNS_OT_COMMANDS_COUNT; ++i)
+    {
+        struct OpenThermCommandT *cmd = &sns_opentherm_commands[i];
+        cmd->m_flags.m_flags = 0;
+        memset(cmd->m_results, 0, sizeof(OpenThermCommandT::m_results));
+    }
+}
+
 #endif
\ No newline at end of file