THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
These limit switches run across the entire back of the heater and monitor the temperature of the outside back panel and the heater's brick core. If the normal operating temperature is exceeded, this switch will interrupt power to the heating elements and prevent heat from being stored in the brick core. The red "SERVICE" light will illuminate to indicate this switch has shut the power off to the heating elements. (This switch will automatically reset when the temperature returns to a normal range.)
Location: Inside the Back Panel (Extends across Length of the Heater)
Illuminates when the core charging high limit switch has interrupted power to the heating elements. The heater will not store heat in the brick core when this light is illuminated. Illumination of the light may indicate there is not enough clearance between the heater and some object; or, possibly, there is an operational difficulty within the heater. If the clearance requirements have been maintained and the light illuminates repeatedly, notify a service technician. (Since this light works in conjunction with the core charging high limit switch, it will automatically turn off when this switch resets.)
Location: On the Control Panel
Monitor discharge air temperature and interrupt power to the blower if the normal operating temperature is exceeded. This limit switch helps protect against the heating of objects which may obstruct the air discharge area.
Location: Inside the Air Discharge Compartment (Grill Area)
(Heaters equipped with a security base only.)
If the heater is not in the upright position, this switch interrupts power to the heating elements and the blower. This prevents the heater from storing heat in or discharging heat from the brick core.
Inside the Electrical Compartment