evaporator freezing

Frosty Evaporator Will Prevent Correct Airflow

Compressor may also become damaged from flooding or slugging

John Tomczyk

March 23, 2022

No Comments

The evaporator is one of the major components of any refrigeration or air conditioning system.

Don’t Forget to Inspect and Clean the Evaporator Coil

Make sure all air conditioning components are operating properly before summer

John Tomczyk

May 27, 2021

No Comments

Summer is almost here, and as part of the seasonal commissioning process, technicians should inspect the evaporator coil and clean it if necessary.

KeepRite Debuts Adaptive Defrost System to AHR Expo Attendees

ESP+ electronic package only defrosts when required

Maria Taylor

February 18, 2019

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John Murray, corporate sales manager at KeepRite Refrigeration, has a nickname for the new ESP+ Intuitive Evaporator Control Technology that his company rolled out at this year’s expo. He calls it the LED lightbulb of the refrigeration industry.

BTU Buddy 186: A Frozen Evaporator

Bill Johnson

September 17, 2018

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Bob and Tim are looking at a system that has a frozen evaporator coil. The system is in a home. They are talking about what has happened to the system and what to do about it.

An air-source heat pump with a severely frosted outdoor evaporator coil. - ACHR

Identifying and Solving Insufficient Evaporator Heat Loading Problems

John Tomczyk

June 4, 2018

No Comments

Frost on an evaporator coil will prevent the correct amount of airflow across the coil. Anytime the evaporator coil experiences reduced airflow across its face, there will be a reduced heat load on the coil.

Danfoss Opens Application Development Center in Florida

The Tallahassee center features three fully automated test facilities

Nick Kostora

September 4, 2017

No Comments

An iced evaporator is a common problem encountered by technicians servicing medium-temperature refrigeration systems. A visual inspection of the coil will show this obvious problem. Most technicians will install their low-side service gauge, find the running pressure to be lower than normal, and conclude the system has a low refrigerant charge. However, an iced evaporator can be caused by a totally different system issue.

Causes of and Cures for an Iced Evaporator

Practice patience and examine the pattern of the icing before acting

Joe Marchese

September 4, 2017

No Comments

An iced evaporator is a common problem encountered by technicians servicing medium-temperature refrigeration systems. A visual inspection of the coil will show this obvious problem. Most technicians will install their low-side service gauge, find the running pressure to be lower than normal, and conclude the system has a low refrigerant charge. However, an iced evaporator can be caused by a totally different system issue.

Troubleshooting Overcharged Refrigerant Issues

Members of The NEWS’ Trainer Panel provide methods and advice for an overcharged system

Nick Kostora

November 21, 2016

No Comments

A refrigeration system with an overcharge of refrigerant is an issue that almost all technicians have come across at some point in their careers.

Ice Breaker: Troubleshooting an Iced Evaporator

Spotting an iced-up evaporator is easy, though determining how it got that way is tougher

Joe Marchese

July 4, 2016

No Comments

An iced-up evaporator is a common service call for any service technician working in this industry. Generally, determining this is the cause of the system problem is rather easy. But what caused the evaporator to ice up may not always be obvious.

FIGURE 1: An evaporator in a walk-in cooler has frost blocking much of the airflow from entering the coil.

The Professor: Foiling Frosted Evaporator Coils

Reduced airflow over the coil can cause a multitude of woes

John Tomczyk

August 3, 2015

No Comments

Technicians should make a list of the causes that could be blamed for this failure and, once the system is up and running, eliminate them, one by one.