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Upright / Chest Freezer Diagnostic 

                                        

 

Symptom Solution Click Images to Enlarge
Compressor runs all the time
  • Check door gaskets
  • Check for defrost timer staying on (Frost Free Models Only)
  • Check for interior light staying on
  • Check thermostat for welded contact points
  • Make sure refrigerator is not located in extreme heat range
  • System might be overcharged or undercharged
freezer1.jpg (74841 bytes)
Upright Freezer (Manual Defrost)
Compressor runs for just a few seconds then clicks off
  • Check compressor amp draw and compare to nomenclature plate
  • Check condenser fan (Frost Free Models Only)
  • Check for lint in condensor coils
  • Check for low voltage conditions
  • Check freezer fan (Frost Free Models Only)
  • Check protective overload
  • Check thermostat for short cycles
  • Make sure back cover is in place
  • If the compressor is pulling too many amps and just hums and clicks every few seconds, the compressor may be locked up. You can try a Hardstart Kit, sometimes they will unlock a compressor 
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HardStart Kit is a Combination Relay, Overload, & Start Capacitor.
This May or May Not Unstick Stuck compressors. No Guarantees that this will unstick it. You cannot return this part. I have seen this Kit used in place of the original relay and overload.
Evaporator coil blocked with ice
  • Check defrost heater  (Frost Free Models Only)
  • Check defrost termination switch (Frost Free Models Only)
  • Check defrost timer (Frost Free Models Only)
  • Check door seals
  • Check for drain being plugged
freezer2.jpg (52759 bytes)
Chest Freezer
Freezer is too warm
  • Check for air flow restrictions (Frost Free Models Only)
  • Check for defrost element staying on (Frost Free Models Only)
  • Check for iced-up evaporator coils
  • Check freezer compartment fan (Frost Free Models Only)
  • Check freezer door gaskets
  • Check thermostat
  • Too much food in freezer
Freezer compressor runs but will not get cold
  • Check for leaks
  • Check for lint in condenser coils
  • Compressor may not be pumping
  • Defrost heater may be stuck on. Check defrost timer (Frost Free Models Only)
  • Refrigerant line could be restricted
Freezer will not run
  • Check compressor
  • Check defrost timer  (Frost Free Models Only)
  • Check for low-voltage conditions. Low voltage conditions can be caused by extension cords. Remove and re-route if possible
  • Check power at wall socket
  • Check power cord to refrigerator
  • Check thermostat
  • Check wiring to compressor to compressor and cord to freezer. Mice like to chew through the wiring. I see this all of the time.
Ice builds up on coils too fast (Manual Defrost Models) 
  • Check door seals for leakage or not sealing well, also look under inside edge of door seal to make sure the door liner isn't cracked around the screws and not holding the gasket and the door properly.

Note: most manual defrost freezers should be defrosted 1 to 2 times per year.

Excessive ice build up on the shelves or walls will fool the thermostat into not coming turning the compressor on

 Do Not use any sharp objects to scrape or chip ice in the freezer as you may damage the coils, which are the shelves or walls in a manual defrost freezer. You can use a hair dryer, shop vac, a fan setting in front of the freezer with the door propped  open or set pans of hot water on the shelves to help melt the ice. If you poke a hole in the coils and the freon leaks out, start looking for a new freezer as it will not be worth repairing.

 
 

 

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