diff --git a/main.c b/main.c
--- a/main.c
+++ b/main.c
@@ -91,8 +91,9 @@ int main(void)
 
     // Check for problems on startup
     if(clock_fail) {
-        ssd1306_DrawString("ERROR: Check Xtal", 3, 0);
-        delay(2000);
+        //ssd1306_DrawStringBig("ERROR: Check Xtal", 2, 0);
+        ssd1306_DrawStringBig("XTAL ERR", 2, 0);
+        delay(5000);
     }
 
     // Init USB
@@ -292,7 +293,7 @@ void draw_setpoint() {
     ssd1306_DrawString(tempstr, 3, 95);
 }
 
-uint8_t goto_mode = 1;
+uint8_t goto_mode = 2;
 
 // State machine
 uint8_t sw_btn_last = 0;
diff --git a/ssd1306.c b/ssd1306.c
--- a/ssd1306.c
+++ b/ssd1306.c
@@ -259,7 +259,7 @@ void ssd1306_drawlogo()
 /* Print a single character from font.cpp */
 void ssd1306_DrawChar(char ascii, unsigned char row, unsigned char xPos)
 {
-    char *srcPointer = 0;
+    char *srcPointer = -1;
     unsigned char i;
 
     srcPointer = &fontData[(ascii-32)][0];
@@ -275,6 +275,69 @@ void ssd1306_DrawChar(char ascii, unsign
     WriteData(0x00);
 }
 
+void ssd1306_DrawCharBig(char ascii, unsigned char row, unsigned char xPos)
+{
+    char *srcPointer = -1;
+    unsigned char i;
+
+    srcPointer = &fontData[(ascii-32)][0];
+
+    setStartPage(row-1);
+    setStartColumn(xPos);
+
+    // Write first row
+    for(i=0;i<5;i++)
+    {
+        uint8_t data = 0;
+        data |= ((*srcPointer) & 0b1000) << 4; // get top 4 bits
+        data |= ((*srcPointer) & 0b1000) << 3; // get top 4 bits
+
+        data |= ((*srcPointer) & 0b0100) << 3; // get top 4 bits
+        data |= ((*srcPointer) & 0b0100) << 2; // get top 4 bits
+
+        data |= ((*srcPointer) & 0b0010) << 2; // get top 4 bits
+        data |= ((*srcPointer) & 0b0010) << 1; // get top 4 bits
+
+        data |= ((*srcPointer) & 0b0001) << 1; // get top 4 bits
+        data |= ((*srcPointer) & 0b0001); // get top 4 bits
+
+        WriteData(data);
+        WriteData(data);
+
+        srcPointer++;
+    }
+    WriteData(0x00);
+
+    srcPointer -= 5;
+
+    setStartPage(row);
+    setStartColumn(xPos);
+
+    // Write second row
+    for(i=0;i<5;i++)
+    {
+        uint8_t data = 0;
+        data |=  (*srcPointer) & 0b10000000; // get top 4 bits
+        data |= ((*srcPointer) & 0b10000000) >> 1; // get top 4 bits
+
+        data |= ((*srcPointer) & 0b01000000) >> 1; // get top 4 bits
+        data |= ((*srcPointer) & 0b01000000) >> 2; // get top 4 bits
+
+        data |= ((*srcPointer) & 0b00100000) >> 2; // get top 4 bits
+        data |= ((*srcPointer) & 0b00100000) >> 3; // get top 4 bits
+
+        data |= ((*srcPointer) & 0b00010000) >> 3; // get top 4 bits
+        data |= ((*srcPointer) & 0b00010000) >> 4; // get top 4 bits
+
+        WriteData(data);
+        WriteData(data);
+
+        srcPointer++;
+    }
+    WriteData(0x00);
+ 
+}
+
 void ssd1306_DrawString(const char *dataPtr, unsigned char row, unsigned char xPos)
 {
     char *srcPointer;
@@ -291,4 +354,22 @@ void ssd1306_DrawString(const char *data
     }
 }
 
+
+void ssd1306_DrawStringBig(const char *dataPtr, unsigned char row, unsigned char xPos)
+{
+    char *srcPointer;
+
+    srcPointer = (char*)dataPtr;
+    ssd1306_DrawCharBig(' ',row,xPos); // NBSP must be written first before the string start
+
+    while(1)
+    {
+        ssd1306_DrawCharBig(*srcPointer,row,xPos);
+        srcPointer++;
+        xPos+=12;
+        if(*srcPointer == 0) break;
+    }
+}
+
+
 // vim:softtabstop=4 shiftwidth=4 expandtab 
diff --git a/ssd1306.h b/ssd1306.h
--- a/ssd1306.h
+++ b/ssd1306.h
@@ -19,7 +19,9 @@
 
 void ssd1306_Init(void);
 void ssd1306_DrawChar(char ascii, unsigned char row, unsigned char xPos);
+void ssd1306_DrawCharBig(char ascii, unsigned char row, unsigned char xPos);
 void ssd1306_DrawString(const char *dataPtr, unsigned char row, unsigned char xPos);
+void ssd1306_DrawStringBig(const char *dataPtr, unsigned char row, unsigned char xPos);
 void ssd1306_drawlogo();
 void ssd1306_clearscreen();