Chapter 19 Installation and Troubleshooting of Domestic Refrigerators and Freezers
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Freezer section and
refrigerator section
too warm.
1. Fan motor not running.
2. Cold control set too warm or broken.
3. Finned evaporator blocked with ice.
4. Shortage of refrigerant.
5. Not enough air circulation around the
cabinet.
6. Dirty condenser or obstructed condenser
ducts.
7. Poor door seal.
8. Repeated door openings.
1. Check the fan motor and replace as needed.
2. Check the control and replace as needed.
3. Check the defrost thermostat or timer. A failure
in either of these could cause icing. Replace as
needed.
4. Check for and repair leaks. Evacuate and recharge
the system. Recover/recycle the refrigerant.
5. Relocate the cabinet or provide adequate
clearance to allow suffi cient circulation.
6. Clean the condenser and the ducts.
7. Level the cabinet and adjust the door seal.
Inspect and replace the gasket if necessary.
8. Instruct user.
Freezer section
too cold
1. Cold control knob improperly set.
2. Cold control sensing bulb not properly
clamped to the evaporator.
3. Broken cold control.
1. Turn the knob to a warmer position.
2. Tighten the clamp or reposition the bulb.
3. Check the control and replace if needed.
Unit runs all the time. 1. Inadequate air circulation over the
condensing coil.
2. Poor door seal.
3. Freezing large quantities of ice cubes
or heavy loading after shopping.
4. Refrigerant undercharge or overcharge.
5. Room temperature too warm.
6. Faulty cold control.
7. Defective light switch.
8. Repeated door openings.
1. Relocate the cabinet to provide adequate
clearance. Remove any obstructions to proper
airfl ow over the condenser coil.
2. Check and make necessary adjustments.
Inspect and replace the gasket if necessary.
3. Explain to the customer that heavy loading
causes long running times.
4. Check, evacuate, and recharge the system with
the proper charge.
5. Ventilate the room as much as possible.
6. Check the control and replace if needed.
7. Check the light switch and replace as needed.
8. Instruct user.
Noisy operation. 1. Loose fl ooring or the fl oor is not fi rm.
2. Tubing contacting the cabinet or other tubing.
3. Cabinet not level.
4. Drip tray vibrating.
5. Fan is hitting the liner or mechanically
grounding.
6. Compressor is mechanically grounded.
1. Tighten the fl ooring or brace the fl oor.
2. Reposition tubing as needed.
3. Level the cabinet.
4. Move the tray or place it on a foam pad.
5. Move the fan.
6. Replace the compressor mounts.
Unit cycles on
overload.
1. Broken relay.
2. Weak overload protector.
3. Low voltage.
4. Faulty compressor.
1. Replace the relay.
2. Replace the overload protector.
3. Check the outlet with a voltmeter. The voltage
under load should be 115 V plus or minus 10%.
If voltage is low, check for multiple appliances
being used on the same circuit or the use of an
extremely long or undersized extension cord
being used.
4. Check for proper operation with test power
cord that is known to be good. Check for proper
grounding. If the power to the unit is adequate
and the unit is properly grounded, replace the
compressor.
Goodheart-Willcox Publisher
Figure 19-5. Continued.