Viking VUAR140 Troubleshooting Guide download pdf (Page 12)

PROBLEM POSSIBLE CAUSE TEST PROCEDURE-ACTION

Internal Sweating Abnormal usage Instruct customer to cover foods and

liquids.

Door Seal Adjust door for proper seal.

Insufficient air circulation Make sure return air flow is not

restricted.

Increase cold air flow by operating

refrigerator compartment as cold as

possible without freezing food.

Incomplete defrosting or Limit switch Check bimetal defrost control. If

high cabinet tempera- bimetal opens too soon defrost will

tures during defrost . be incomplete and frost will accumulate.

If bimetal is stuck closed or opens too

late, high cabinet temperature will

result. A loose bimetal may cause the

defrost heater to stay on too long.

Change bimetal if defective.

Timer Check timer for proper operation. Timer

should initiate 21 minute defrost cycle

every 10 hours. Replace if defective.

Defrost Heater Check defrost heater with ohmmeter.

Inoperative defrost heater will result in

frost and ice accumulation on evaporator.

Replace if defective.

Drain clogged Clogged drain may result in ice buildup

in evaporator. Clear drain system.

Taste and odor Odorous food Instruct customer to keep food covered

and clean refrigerator and freezer with

solution of baking soda and water.

Explain how odor and taste of food in

refrigerator can be absorbed by ice cubes

in freezer due to internal air circulation.

Hot plastic Check for a heater in contact with plastic

or sealing compound, which may cause

odor.

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Viking VUAR140 Troubleshooting Guide Page 12