GE ZEK957 Series Technical Service Manual

Also see for JKP18 Series: Owner's manual Owner's manual Owner's manual Installation instructions Installation instructions

GE ZEK957 Series Technical Service Manual Manual pdf 39 page image

– 37 –close at 140 °F, restoring function to the unit.If the magnetron TCO has opened, check for fanfailure, obstructed air ducts, or dirty or blocked airintake.Microwave Fan Thermal SwitchObtain access to the fan TCO by placing thecontrol panel in the service position.OPEN - 140 °FCLOSED - 158 °FA fan thermal switch is mounted on the microwavebaseplate. If, during lower oven use, the baseplateshould reach 158 °F, the fan thermal switch willclose, activating the magnetron fan. This willassist in removing heat from the componentcompartment.Microwave FuseObtain access to the fuse by placing the controlpanel in the service position.Warning: When the 20-amp fuse is blown due tothe operation of the monitor switch, the monitorswitch must be replaced. Also replace relays and/or interlock switches when continuity check showscontacts shorted.A 20-amp fuse is connected to the line-in side ofthe unit’s circuitry and is common to all functionsand the door switches. If this fuse blows (open),no functions will operate, including the display.Microwave Flame TCOThe microwave must be removed from the oven toservice the flame sensor.OPEN - 240 °FThe flame TCO is a one-shot, nonresettable TCOmounted to the left side of the oven cavity. In theevent the oven temperature reaches 240 °F, theflame TCO will open, automatically shutting theoven off. The flame TCO is connected to the line-in side of the circuit.Fan TCOFlame TCOFuseFuse