🐛 Fix fan index for Singlenozzle, chamber fan

Fixes #22512
Followup to #19152, #19519

Marlin/src/inc/SanityCheck.h

@@ -2047,10 +2047,10 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
     #error "TEMP_SENSOR_REDUNDANT_TARGET can't be Cooler (-5): requires TEMP_COOLER_PIN"
   #endif
 
-  #if TEMP_SENSOR_REDUNDANT_IS_MAX_TC && TEMP_SENSOR_REDUNDANT_SOURCE == 0 && !PIN_EXISTS(TEMP_0_CS)
-    #error "TEMP_SENSOR_REDUNDANT MAX Thermocouple with TEMP_SENSOR_REDUNDANT_SOURCE 0 requires TEMP_0_CS_PIN."
-  #elif TEMP_SENSOR_REDUNDANT_IS_MAX_TC && TEMP_SENSOR_REDUNDANT_SOURCE == 1 && !PIN_EXISTS(TEMP_1_CS)
-    #error "TEMP_SENSOR_REDUNDANT MAX Thermocouple with TEMP_SENSOR_REDUNDANT_SOURCE 1 requires TEMP_1_CS_PIN."
+  #if TEMP_SENSOR_REDUNDANT_IS_MAX_TC && REDUNDANT_TEMP_MATCH(SOURCE, E0) && !PIN_EXISTS(TEMP_0_CS)
+    #error "TEMP_SENSOR_REDUNDANT MAX Thermocouple with TEMP_SENSOR_REDUNDANT_SOURCE E0 requires TEMP_0_CS_PIN."
+  #elif TEMP_SENSOR_REDUNDANT_IS_MAX_TC && REDUNDANT_TEMP_MATCH(SOURCE, E1) && !PIN_EXISTS(TEMP_1_CS)
+    #error "TEMP_SENSOR_REDUNDANT MAX Thermocouple with TEMP_SENSOR_REDUNDANT_SOURCE E1 requires TEMP_1_CS_PIN."
   #endif
 #endif
 

Marlin/src/module/temperature.cpp

@@ -369,7 +369,7 @@ const char str_t_thermal_runaway[] PROGMEM = STR_T_THERMAL_RUNAWAY,
       }
     #endif
 
-    TERN_(SINGLENOZZLE, fan = 0); // Always use fan index 0 with SINGLENOZZLE
+    TERN_(SINGLENOZZLE, if (fan < EXTRUDERS) fan = 0); // Always fan 0 for SINGLENOZZLE E fan
 
     if (fan >= FAN_COUNT) return;
 
@@ -1461,7 +1461,7 @@ void Temperature::manage_heater() {
             fan_chamber_pwm = CHAMBER_FAN_BASE + _MAX((CHAMBER_FAN_FACTOR) * (temp_chamber.celsius - temp_chamber.target), 0);
           #endif
           NOMORE(fan_chamber_pwm, 225);
-          set_fan_speed(2, fan_chamber_pwm); // TODO: instead of fan 2, set to chamber fan
+          set_fan_speed(CHAMBER_FAN_INDEX, fan_chamber_pwm); // TODO: instead of fan 2, set to chamber fan
         #endif
 
         #if ENABLED(CHAMBER_VENT)
@@ -1492,7 +1492,7 @@ void Temperature::manage_heater() {
       else if (!flag_chamber_off) {
         #if ENABLED(CHAMBER_FAN)
           flag_chamber_off = true;
-          set_fan_speed(2, 0);
+          set_fan_speed(CHAMBER_FAN_INDEX, 0);
         #endif
         #if ENABLED(CHAMBER_VENT)
           flag_chamber_excess_heat = false;