diff --git a/master/master/lib/logger.c b/master/master/lib/logger.c
--- a/master/master/lib/logger.c
+++ b/master/master/lib/logger.c
@@ -66,7 +66,7 @@ void logger_setup()
 
 	if(!sd_raw_init())
 	{
-		error_log(ERROR_SD_INIT);
+		error_log(ERROR_SD_INIT, true);
 		return;
 	}
 
@@ -80,7 +80,7 @@ void logger_setup()
 	if(!partition)
 	{
 		// Error opening partition. MBR might be screwed up.
-		error_log(ERROR_SD_PARTITION);
+		error_log(ERROR_SD_PARTITION, true);
 		return;
 	}
 	
@@ -90,7 +90,7 @@ void logger_setup()
 	if(!fs)
 	{
 		// opening filesystem failed
-		error_log(ERROR_SD_PARTITION);
+		error_log(ERROR_SD_PARTITION, true);
 		return;
 	}
 	
@@ -103,7 +103,7 @@ void logger_setup()
 	{
 		// opening root directory failed
 		_delay_ms(10);
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 		return;
 	}
 	
@@ -122,14 +122,14 @@ void logger_setup()
 	if(fat_create_file(dd, errorFilename, &errorDirEntry) == 0)
 	{
 		serial0_sendString("Error create errorlog\r\n");
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 	}
 	// Search for file in current directory and open it
 	fd_errorlog = open_file_in_dir(fs, dd, errorFilename);
 	if(!fd_errorlog)
 	{
 		serial0_sendString("Error open errorlog!\r\n");
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 		return;
 	}
 	errorOffset=0;
@@ -137,7 +137,7 @@ void logger_setup()
 	{
 		// Error seeking to file
 		serial0_sendString("Error seek errorlog!\r\n");
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 		fat_close_file(fd_errorlog);
 		return;
 	}
@@ -153,14 +153,14 @@ void logger_setup()
 	if(fat_create_file(dd, dataFilename, &dataDirEntry) == 0) 
 	{
 		serial0_sendString("Error create datalog\r\n");
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 	}
 	// Search for file in current directory and open it
 	fd_datalog = open_file_in_dir(fs, dd, dataFilename);
 	if(!fd_datalog)
 	{
 		serial0_sendString("Error open datalog!\r\n");
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 		return;
 	}
 	dataOffset=0;
@@ -168,7 +168,7 @@ void logger_setup()
 	{
 		// Error seeking to file
 		serial0_sendString("Error seek datalog!\r\n");
-		error_log(ERROR_SD_FILE);
+		error_log(ERROR_SD_FILE, true);
 		fat_close_file(fd_datalog);
 		return;
 	}
@@ -192,19 +192,23 @@ void logger_log(char *buffer)
 	}
 }
 
-void error_log(uint8_t errNo)
+void error_log(uint8_t errNo, bool flashLED)
 {
 	char labelBuffer[32];
 	labelBuffer[0] = 0x00;
 	
 	if(errNo <= MAX_ERRNO) 
 	{
-	strncpy_P(labelBuffer,(char*)pgm_read_word(&(errorMessageLookup[errNo])),32);
+		strncpy_P(labelBuffer,(char*)pgm_read_word(&(errorMessageLookup[errNo])),32);
 	}
 	char errorLine[128];
 	snprintf(errorLine, 128, "%lu, %u, %s,\r\n", time_millis(), errNo, labelBuffer);
 	error_log_rawwrite(errorLine);
-	led_errorcode(errNo);
+	
+	if(flashLED) 
+	{
+		led_errorcode(errNo);
+	}	
 }
 
 void error_log_rawwrite(char *buffer) 
diff --git a/master/master/lib/logger.h b/master/master/lib/logger.h
--- a/master/master/lib/logger.h
+++ b/master/master/lib/logger.h
@@ -14,11 +14,13 @@
 #ifndef LOGGER_H_
 #define LOGGER_H_
 
+#include <stdbool.h>
+
 void logger_setup();
 uint8_t logger_writeLine(char* dateLine, uint8_t length);
 struct fat_file_struct* open_file_in_dir(struct fat_fs_struct* fs, struct fat_dir_struct* dd, const char* name);
 uint8_t find_file_in_dir(struct fat_fs_struct* fs, struct fat_dir_struct* dd, const char* name, struct fat_dir_entry_struct* dir_entry);
-void error_log(uint8_t errNo);
+void error_log(uint8_t errNo, bool flashLED);
 void error_log_rawwrite(char *buffer);
 void logger_log(char *buffer);
 void logger_closeLog();
diff --git a/master/master/lib/slavesensors.c b/master/master/lib/slavesensors.c
--- a/master/master/lib/slavesensors.c
+++ b/master/master/lib/slavesensors.c
@@ -490,7 +490,7 @@ void slavesensors_process(uint8_t parseR
 			// if we're requesting, we have no data, and we're over the timeout, this is bad!
 			// setParserState(STATE_RESET); - meh, can't do this because it freaking increments the cirbufptr
 			gotoNextSlaveOrSensor(true);
-			error_log(ERROR_SLAVETIMEOUT);
+			error_log(ERROR_SLAVETIMEOUT, false); // log error, don't blink LED
 		}
 	}