From c42c6745b960b989e3373a7bedc663b6360d57f5 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Wed, 25 Mar 2026 14:06:48 -0400
Subject: [PATCH] [mcp9600] Fix setup success check using OR instead of AND
 (#15165)

---
 esphome/components/mcp9600/mcp9600.cpp | 28 +++++++++++++-------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/esphome/components/mcp9600/mcp9600.cpp b/esphome/components/mcp9600/mcp9600.cpp
index ff411bef7a..0c5362b4ba 100644
--- a/esphome/components/mcp9600/mcp9600.cpp
+++ b/esphome/components/mcp9600/mcp9600.cpp
@@ -40,20 +40,20 @@ void MCP9600Component::setup() {
   }
 
   bool success = this->write_byte(MCP9600_REGISTER_STATUS, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_SENSOR_CONFIG, uint8_t(0x00 | thermocouple_type_ << 4));
-  success |= this->write_byte(MCP9600_REGISTER_CONFIG, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT1_CONFIG, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT2_CONFIG, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT3_CONFIG, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT4_CONFIG, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT1_HYSTERESIS, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT2_HYSTERESIS, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT3_HYSTERESIS, 0x00);
-  success |= this->write_byte(MCP9600_REGISTER_ALERT4_HYSTERESIS, 0x00);
-  success |= this->write_byte_16(MCP9600_REGISTER_ALERT1_LIMIT, 0x0000);
-  success |= this->write_byte_16(MCP9600_REGISTER_ALERT2_LIMIT, 0x0000);
-  success |= this->write_byte_16(MCP9600_REGISTER_ALERT3_LIMIT, 0x0000);
-  success |= this->write_byte_16(MCP9600_REGISTER_ALERT4_LIMIT, 0x0000);
+  success &= this->write_byte(MCP9600_REGISTER_SENSOR_CONFIG, uint8_t(0x00 | thermocouple_type_ << 4));
+  success &= this->write_byte(MCP9600_REGISTER_CONFIG, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT1_CONFIG, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT2_CONFIG, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT3_CONFIG, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT4_CONFIG, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT1_HYSTERESIS, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT2_HYSTERESIS, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT3_HYSTERESIS, 0x00);
+  success &= this->write_byte(MCP9600_REGISTER_ALERT4_HYSTERESIS, 0x00);
+  success &= this->write_byte_16(MCP9600_REGISTER_ALERT1_LIMIT, 0x0000);
+  success &= this->write_byte_16(MCP9600_REGISTER_ALERT2_LIMIT, 0x0000);
+  success &= this->write_byte_16(MCP9600_REGISTER_ALERT3_LIMIT, 0x0000);
+  success &= this->write_byte_16(MCP9600_REGISTER_ALERT4_LIMIT, 0x0000);
 
   if (!success) {
     this->error_code_ = FAILED_TO_UPDATE_CONFIGURATION;