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​What should you expect your Cold Plus, LLC  technician to do during a PM visit?
 

• Check system functions, safety controls, and adjust the operating sequence where appropriate.

• Inspect electrical components and connections and repair/replace or tighten as required.

• Ensure proper airflow and change dirty air filters.

• Inspect pumps, lubricate, and check flow rates where appropriate.

• Clean and lubricate motors as required.

• Examine belts, adjust and align as required.

• Inspect, clean and balance blowers as required.
   

Spring Visit (preparation for summer season):

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• Clean inside coil, condensate pans, condensate traps, and condensate lines to prevent obstructions.

• Clean outside coil and straighten fins for efficient operation.

• Check refrigerant levels and if low, find the leak. (According to many equipment manufacturers, a 10% refrigerant loss will result in a 20% decrease in system efficiency!)
   

Fall Visit (preparation for winter season):
 

• Clean the burner assembly.

• Remove soot from fireside of burner.

• Clean and check operation of humidifier.

• Visually or with remote camera, inspect heat exchanger for cracks.

• Adjust air/fuel ratio of burner and perform combustion analysis. (Instrumentation used for combustion analysis is a means of fine-tuning a burner to achieve maximum fuel efficiency and “optimum firing.”)
  
  Note: For heat pump applications, winter season inspections repeat a number of the summer procedures plus several additional checks. Maintaining semi-annual PMAs for heatpumps is also important.

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