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Home » Authors » Joe Marchese

Articles by Joe Marchese

Troubleshooting Ice Machine Evaporators

Determining evaporator design can help identify problems
Joe Marchese
December 3, 2018
The higher the inlet water temperature, the more sensible heat must be removed from the water and the longer the freeze cycle. The latent heat removed causes the water to change state, thus producing ice.
Read More

Don’t Just Walk Away From Difficult Refrigeration Repairs — Fix Them

Technicians must find solutions to challenging service problems
Joe Marchese
November 5, 2018
Technicians must find solutions to challenging service problems.
Read More

Safety Always Comes First When Working With HVACR Systems

Joe Marchese
October 1, 2018
There are many reasons why some choose to work unsafely, but a big one is just being lazy. Try to avoid this and always take the extra time needed to work safely.
Read More

Finding and Fixing Refrigerant Leaks Is Frustrating but Necessary

Joe Marchese
September 3, 2018
It is always best to find and repair the source of the leak. But depending on the size of the system and the size and location of the refrigerant leak, it may not be an easy or inexpensive repair.
Read More

Identify All Problems Before Quoting a Refrigeration Job

A Series of Unfortunate Events
Joe Marchese
August 6, 2018
Here is the potential problem: A contractor quotes a customer on the compressor replacement, and he agrees to repair the cooler at the quoted price. Then, as the technician is completing the job — or even after he has finished replacing the compressor — he finds out there is another system problem.
Read More

Pre-Charged Line Sets Save Time, Money When Installed Correctly

Joe Marchese
July 2, 2018
Some refrigeration systems are designed to be installed using a pre-charged line set.
Read More

Troubleshooting the Root Cause for a Refrigerant Starved Evaporator

Proper diagnosis is necessary to prevent further problems
Joe Marchese
June 4, 2018
While troubleshooting and repairing refrigeration systems, a common problem is a starved evaporator, meaning not enough refrigerant is entering the evaporator for the heat load placed on it.
Read More

HVAC Technicians and Contractors Should Strive To Do Well on Industry Exams

Joe Marchese
April 30, 2018
The refrigeration industry has a variety of competency exams and certification tests for technicians.
Read More
Joe Marchese

Troubleshooting Reasons for Failing Start Capacitors

Tips for troubleshooting possible causes and best practices for replacing
Joe Marchese
April 2, 2018
Many single-phase compressors require a start capacitor to assist in starting the motor. These capacitors will occasionally fail, causing a compressor to fail to start.
Read More
JOE MARCHESE

Grounding Electrical Components

That ground wire is there for a reason: to protect you and others who work on the system
Joe Marchese
March 5, 2018
When replacing electrical components, it is very important to ensure the component is properly grounded. Do not overlook the importance of the ground wire. Although many times an ungrounded component will not affect the operation, it is not safe.
Read More
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