diff --git a/stm-firmware/shell.c b/stm-firmware/shell.c
index b4cd5da..9c54313 100644
--- a/stm-firmware/shell.c
+++ b/stm-firmware/shell.c
@@ -274,8 +274,11 @@ static shellmatta_retCode_t shell_cmd_pt1000_res_loop(const shellmatta_handle_t
 			shellmatta_printf(handle, "\x1b[1A\x1b[150D\x1b[K");
 		shell_cmd_pt1000_res(handle, "", 0UL);
 
-		led_set(0, led_status);
-		led_set(1, !led_status);
+		led_set(1, led_status);
+		if (adc_pt1000_check_error() & ADC_PT1000_WATCHDOG_ERROR) {
+			led_set(0, 1);
+		}
+
 		led_status ^= 0x1;
 
 		systick_wait_ms(150);