diff --git a/esphome/components/daikin_arc/daikin_arc.cpp b/esphome/components/daikin_arc/daikin_arc.cpp
index f806463d00..068819ecd1 100644
--- a/esphome/components/daikin_arc/daikin_arc.cpp
+++ b/esphome/components/daikin_arc/daikin_arc.cpp
@@ -26,7 +26,7 @@ void DaikinArcClimate::transmit_query_() {
   uint8_t remote_header[8] = {0x11, 0xDA, 0x27, 0x00, 0x84, 0x87, 0x20, 0x00};
 
   // Calculate checksum
-  for (int i = 0; i < sizeof(remote_header) - 1; i++) {
+  for (size_t i = 0; i < sizeof(remote_header) - 1; i++) {
     remote_header[sizeof(remote_header) - 1] += remote_header[i];
   }
 
@@ -102,7 +102,7 @@ void DaikinArcClimate::transmit_state() {
   remote_state[9] = fan_speed & 0xff;
 
   // Calculate checksum
-  for (int i = 0; i < sizeof(remote_header) - 1; i++) {
+  for (size_t i = 0; i < sizeof(remote_header) - 1; i++) {
     remote_header[sizeof(remote_header) - 1] += remote_header[i];
   }
 
@@ -350,7 +350,7 @@ bool DaikinArcClimate::on_receive(remote_base::RemoteReceiveData data) {
   bool valid_daikin_frame = false;
   if (data.expect_item(DAIKIN_HEADER_MARK, DAIKIN_HEADER_SPACE)) {
     valid_daikin_frame = true;
-    int bytes_count = data.size() / 2 / 8;
+    size_t bytes_count = data.size() / 2 / 8;
     std::unique_ptr<char[]> buf(new char[bytes_count * 3 + 1]);
     buf[0] = '\0';
     for (size_t i = 0; i < bytes_count; i++) {
@@ -370,7 +370,7 @@ bool DaikinArcClimate::on_receive(remote_base::RemoteReceiveData data) {
   if (!valid_daikin_frame) {
     char sbuf[16 * 10 + 1];
     sbuf[0] = '\0';
-    for (size_t j = 0; j < data.size(); j++) {
+    for (size_t j = 0; j < static_cast<size_t>(data.size()); j++) {
       if ((j - 2) % 16 == 0) {
         if (j > 0) {
           ESP_LOGD(TAG, "DATA %04x: %s", (j - 16 > 0xffff ? 0 : j - 16), sbuf);
@@ -380,19 +380,26 @@ bool DaikinArcClimate::on_receive(remote_base::RemoteReceiveData data) {
       char type_ch = ' ';
       // debug_tolerance = 25%
 
-      if (DAIKIN_DBG_LOWER(DAIKIN_ARC_PRE_MARK) <= data[j] && data[j] <= DAIKIN_DBG_UPPER(DAIKIN_ARC_PRE_MARK))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_ARC_PRE_MARK)) <= data[j] &&
+          data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_ARC_PRE_MARK)))
         type_ch = 'P';
-      if (DAIKIN_DBG_LOWER(DAIKIN_ARC_PRE_SPACE) <= -data[j] && -data[j] <= DAIKIN_DBG_UPPER(DAIKIN_ARC_PRE_SPACE))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_ARC_PRE_SPACE)) <= -data[j] &&
+          -data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_ARC_PRE_SPACE)))
         type_ch = 'a';
-      if (DAIKIN_DBG_LOWER(DAIKIN_HEADER_MARK) <= data[j] && data[j] <= DAIKIN_DBG_UPPER(DAIKIN_HEADER_MARK))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_HEADER_MARK)) <= data[j] &&
+          data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_HEADER_MARK)))
         type_ch = 'H';
-      if (DAIKIN_DBG_LOWER(DAIKIN_HEADER_SPACE) <= -data[j] && -data[j] <= DAIKIN_DBG_UPPER(DAIKIN_HEADER_SPACE))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_HEADER_SPACE)) <= -data[j] &&
+          -data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_HEADER_SPACE)))
         type_ch = 'h';
-      if (DAIKIN_DBG_LOWER(DAIKIN_BIT_MARK) <= data[j] && data[j] <= DAIKIN_DBG_UPPER(DAIKIN_BIT_MARK))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_BIT_MARK)) <= data[j] &&
+          data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_BIT_MARK)))
         type_ch = 'B';
-      if (DAIKIN_DBG_LOWER(DAIKIN_ONE_SPACE) <= -data[j] && -data[j] <= DAIKIN_DBG_UPPER(DAIKIN_ONE_SPACE))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_ONE_SPACE)) <= -data[j] &&
+          -data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_ONE_SPACE)))
         type_ch = '1';
-      if (DAIKIN_DBG_LOWER(DAIKIN_ZERO_SPACE) <= -data[j] && -data[j] <= DAIKIN_DBG_UPPER(DAIKIN_ZERO_SPACE))
+      if (static_cast<int32_t>(DAIKIN_DBG_LOWER(DAIKIN_ZERO_SPACE)) <= -data[j] &&
+          -data[j] <= static_cast<int32_t>(DAIKIN_DBG_UPPER(DAIKIN_ZERO_SPACE)))
         type_ch = '0';
 
       if (abs(data[j]) > 100000) {
@@ -400,7 +407,7 @@ bool DaikinArcClimate::on_receive(remote_base::RemoteReceiveData data) {
       } else {
         sprintf(sbuf, "%s%-5d[%c] ", sbuf, (int) (round(data[j] / 10.) * 10), type_ch);
       }
-      if (j == data.size() - 1) {
+      if (j + 1 == static_cast<size_t>(data.size())) {
         ESP_LOGD(TAG, "DATA %04x: %s", (j - 8 > 0xffff ? 0 : j - 8), sbuf);
       }
     }