diff --git a/macros/calibration.cfg b/macros/calibration.cfg
index b96e1b9e..67b24b72 100644
--- a/macros/calibration.cfg
+++ b/macros/calibration.cfg
@@ -61,7 +61,7 @@ gcode:
 		_CONSOLE_SAVE_CONFIG
 		_LEARN_MORE_CALIBRATION
 	{% else %}
-		{% set link_url = "https://github.com/HelgeKeck/RatOS/tree/documentation_v2.1/site/docs/configuration/chamber_heater.md" %}
+		{% set link_url = "https://os.ratrig.com/docs/configuration/chamber_heater" %}
 		{% set link_text = "RatOS Chamber Heater" %}
 		{% set line_1 = '"Learn more about the <a href="%s" target="_blank" >%s</a>"' % (link_url, link_text) %}
 		CONSOLE_ECHO TITLE="No chamber heater found" TYPE="warning" MSG={line_1}
@@ -84,6 +84,8 @@ gcode:
 		DEBUG_ECHO PREFIX="START_PA_TOWER" MSG="START: {start}, FACTOR: {factor}"
 		RATOS_ECHO MSG="Starting presssure advance tuning tower..."
 		TUNING_TOWER COMMAND=SET_PRESSURE_ADVANCE PARAMETER=ADVANCE START={start} FACTOR={factor}
+  	{% else %}
+   		RATOS_ECHO MSG="Presssure advance tuning tower requires you to be printing gcode and on layer 1 to start."
 	{% endif %}
 
 	_LEARN_MORE_CALIBRATION