From ef8f82951357e45a6a13069e089bca5ea79b07c3 Mon Sep 17 00:00:00 2001
From: Giuliano Zaro <3684609+GMagician@users.noreply.github.com>
Date: Mon, 20 Jan 2020 07:44:51 +0100
Subject: [PATCH] Fix CHAMBER_MAXTEMP security margin (#16600)

---
 Marlin/src/lcd/menu/menu_temperature.cpp | 2 +-
 Marlin/src/module/temperature.h          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Marlin/src/lcd/menu/menu_temperature.cpp b/Marlin/src/lcd/menu/menu_temperature.cpp
index 0a774e04d..2713f9fe7 100644
--- a/Marlin/src/lcd/menu/menu_temperature.cpp
+++ b/Marlin/src/lcd/menu/menu_temperature.cpp
@@ -191,7 +191,7 @@ void menu_temperature() {
   // Chamber:
   //
   #if HAS_HEATED_CHAMBER
-    EDIT_ITEM_FAST(int3, MSG_CHAMBER, &thermalManager.temp_chamber.target, 0, CHAMBER_MAXTEMP - 5, thermalManager.start_watching_chamber);
+    EDIT_ITEM_FAST(int3, MSG_CHAMBER, &thermalManager.temp_chamber.target, 0, CHAMBER_MAXTEMP - 10, thermalManager.start_watching_chamber);
   #endif
 
   //
diff --git a/Marlin/src/module/temperature.h b/Marlin/src/module/temperature.h
index 1e814294a..9c1860798 100644
--- a/Marlin/src/module/temperature.h
+++ b/Marlin/src/module/temperature.h
@@ -711,7 +711,7 @@ class Temperature {
       static void setTargetChamber(const int16_t celsius) {
         temp_chamber.target =
           #ifdef CHAMBER_MAXTEMP
-            _MIN(celsius, CHAMBER_MAXTEMP)
+            _MIN(celsius, CHAMBER_MAXTEMP - 10)
           #else
             celsius
           #endif