Service and Maintenance

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This article will compare subcooling amounts in a refrigeration system for three scenarios: an overcharge of refrigerant, a dirty condenser, and air in the system.

Your customers just want their problems fixed. Do you offer excuses or results?

A defective tool can lead you in the wrong direction as you try to determine the root cause of a problem.

In this troubleshooting situation, the customer’s complaint is that their office air conditioner is “not cooling at all.”

In the end, it's about airflow control. Unless your solution involves airflow and pressure measurement, you're guessing whether the repair worked.

Systematic troubleshooting using the symptom/cause method is a quick and efficient way a service technician can solve even the toughest of service calls.

When electrically inspecting or troubleshooting a compressor, you should always protect yourself against the possibility of terminal venting.

Failed ventilation itself has many more risks that owners and operators are less practiced at accounting for, but should no longer be left off the list.

NATE’s biggest rollout last year was its CHP-5 certification pathway.

The "magic number" 1.08 is convenience factor. It is a bunch of math combined into one factor as a shortcut, although sometimes more precise calculation is better.