Sub Zero Repair

Sub Zero Refrigerator Repair

BEst sub zero technicians in howard county and baltimore !

Here our appliance repair expert technicians, understand how to eliminate all electro-mechanical component failures before assuming a total sealed system failure.


Common Sub zero circuit repair

  • Refrigerator control board system circuits repair
  • Defrost system circuits repair
  • Mullion and Stile anti-sweat circuits repair
  • Ice maker circuits cip

Common subzero repair

  • PTC relay repair
  • Compressor repair
  • Condenser fan motor
  • Evaporator fan moto
  • Defrost timer motor repair
  • Defrost heater repair
  • Defrost control board repair
  • Main control board repair


Common Switches
  • Defrost timer
  • Thermostats
  • Overloads
  • PTC relays

In order to accomplish the above our technicians fully understand how a sub-zero refrigerator system works. Both parallel circuits and series circuits in each refrigerator system in various models.

In sub-zero refrigerators and many other common refrigeration systems we have found the following sealed system failure types.


Common points of refrigerator failure
  • Evaporator inlet temperature
  • Refrigerator storage temp
  • Condenser inlet temp
  • Condenser outlet temp
  • Suction line temp
  • Unusual refrigerator noises
  • Wattage variations
  • Amperage variations
  • Frost pattern
  • Low side pressures
  • High side pressures


  1. No failure at all
  2. refrigerant leak causing a low charge
  3. Partial sealed  system restriction.
  4. Complete sealed system restriction
  5. Sealed system over charge

Maintenance tips:

  • Ensure adequate air flow to the coil system
  • Clean system regularly to ensure proper heat extraction
  • Ensure door closes all the way at all times.
  • Check for leaks through the gaskets.


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