If you're looking for help fixing your SubZero Microwave, look no further! Our comprehensive SubZero Microwave error code guide will explain common issues, provide tips, and show you how to read your model's error codes.

CODE: 40 
PROBLEM: Less than 5?? change in temperature over 10 minutes of continuous call for heat. Occurs only during preheat mode and the door is closed. 
FIX: Power the unit off by pressing the Power On/Off key. Press and hold the Power On/Off key, along with Med and Proof keys simultaneously for five seconds. "RE" appears on the display. Press and hold Timer Up and Timer Down simultaneously for five seconds. The unit will beep one time. Press Timer Up one time and release. If cleared, display should now read Error None.Exit Diagnostic mode by pressing the Power On/Off key. Verify unit operation by turning unit on and allowing it to preheat. 

CODE: 50 
PROBLEM: Door switch closed when keypad is operating or unit is turning on. 
FIX: Power the unit off by pressing the Power On/Off key. Press and hold Power On/Off key along with MED and PROOF keys simultaneously for 5 seconds. The display should now read "RE". Press and hold the Timer up arrow and the Timer down arrow simultaneously for 5 seconds. The unit will beep one time. Press the Timer up arrow one time and release. If cleared, display should now read "Error None". Exit diagnostic mode by pressing Power On/Off key. Verify unit operation by turning unit on and allowing to preheat. 

CODE: 60 
PROBLEM: Warming Drawer temperature rises to 250??F in any mode/state. 
FIX: Verify ambient temperature is not extremely hot. When installed outdoors, direct sunlight may cause this error code to appear. Verify proper product installation. Refer to the product Installation Guide for further installation information. Turn the home circuit breaker to the unit off for 30 seconds then back on again. Retest the unit operation. If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair. 

CODE: 70 
PROBLEM: Cable wires that activate element or fan relays on power board are not making connection. 
FIX: Turn power to the unit off at the circuit breaker. Restore power and see if the error returns.

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