diff --git a/display.c b/display.c
--- a/display.c
+++ b/display.c
@@ -25,7 +25,7 @@ static uint8_t sw_right_last = 0;
 static uint8_t trigger_drawsetpoint = 1;
 static int16_t last_temp = 21245;
 static int16_t last_temp_frac = 21245;
-static int16_t last_state = STATE_IDLE;
+static int16_t last_state = STATE_RESET;
 static uint8_t goto_mode = MODE_HEAT;
 static uint8_t reset_mode = RESET_REBOOT;
 
@@ -409,8 +409,20 @@ void display_process(therm_settings_t* s
             itoa(status->error_code, tempstr, 10);
             ssd1306_drawstring(tempstr, 0, 57);
 
-            //TODO: add RTD error codes
-
+			#ifdef MAX31865_RTD_SENSOR
+            // RTD error codes
+            if(status->error_code & 0b00000100)
+                ssd1306_drawstring(" RTD Over/Undervolt", 1, 0);
+            else if(status->error_code & 0b00001000)
+                ssd1306_drawstring("    RTD FORCE- Open", 1, 0);
+            else if(status->error_code & 0b00010000)
+                ssd1306_drawstring("RTD REF FORCE- Open", 1, 0);
+            else if(status->error_code & 0b00100000)
+                ssd1306_drawstring("    RTD REFIN- High", 1, 0);
+            else
+                ssd1306_drawstring("#?, Unknown Error", 1, 0);
+			#else
+            // TC error codes
             if(status->error_code == 1)
                 ssd1306_drawstring("    TC Open Circuit", 1, 0);
             else if(status->error_code == 4)
@@ -419,6 +431,7 @@ void display_process(therm_settings_t* s
                 ssd1306_drawstring("    TC Short to VCC", 1, 0);
             else
                 ssd1306_drawstring("#?, Unknown Error", 1, 0);
+			#endif
             ssd1306_drawstring("                    ", 2, 0);
 
             ssd1306_drawstring("-> to ignore all or", 2, 0);