TM 10-6640-215-13 Table 3-2.  Troubleshooting - continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 38. FREEZER (ICE CUBE MAKER) FAILS TO OPERATE. Step 1. Ensure unit's power cord is plugged into convenience outlet J 10. Step 2. Check and reset circuit breaker A1CB8 located in MAIN POWER PANEL. Step 3. Check thermostat control. Turn thermostat control knob to maximum cold setting. If freezer still fails to operate, notify unit maintenance. 39. OXYGEN STABILITY BATH FAILS TO OPERATE. Step 1. Check the 3-position heat switch. Place switch in the HIGH HEAT position. Step 2. Check and reset circuit breaker A1CB15 located in MAIN POWER PANEL. If bath still fails to operate, notify unit maintenance. 40. LABORATORY OVEN FAILS TO OPERATE (DOES NOT HEAT). Step 1. Ensure unit's power cord is plugged into convenience outlet for laboratory oven. Step 2. Check position of line switch. Place line switch ON. Step 3. Check and reset circuit breaker A1CB4 located in MAIN POWER PANEL. If oven still fails to operate, notify unit maintenance. 41. BURN-OUT FURNACE FAILS TO HEAT (POWER SWITCH ON; POWER SWITCH LIGHT NOT LIT). Step 1. Ensure unit's power cord is plugged into convenience outlet for muffler furnace. Step 3. Check and reset circuit breaker A1CB12 located in MAIN POWER PANEL. If furnace still fails to heat, notify unit maintenance. 3-13