ACHR News
search
Ask ACHR NEWS AI
cart
facebook twitter instagram linkedin youtube
  • Sign In
  • Subscribe
  • Sign Out
  • My Account
ACHR News
  • NEWS
    • Breaking News
    • New HVAC Products
    • Featured Products
    • Manufacturer Reports
    • HVAC Data
    • Legislation
    • ACHR NEWS Centennial
  • RESIDENTIAL
    • Air Conditioners
    • Furnaces
    • Residential Heat Pumps
    • Ductless
    • Residential IAQ
    • Testing, Monitoring, Tools
    • Components & Accessories
  • COMMERCIAL
    • Air Handlers
    • Rooftop Units
    • Chillers and Cooling Towers
    • Commercial Heat Pumps
    • Boilers and Hydronics
    • VRF/Ductless
    • Commercial IAQ
  • REFRIGERATION
    • Refrigerants
    • Refrigerant Regulations
    • Leak Management
  • CONTRACTOR PRO
    • Geothermal
    • Homeowner Study
    • VRF and VRV Ductless
    • Unitary Trends
  • EDUCATION
    • Training and Education
    • Business Management
    • Service and Maintenance
    • Continuing Education
    • Market Research >
      • HVAC Brand Awareness Report
      • VRV, VRF, VRVZ Report
      • Unitary Trends Report
      • Water Heat Professionals Report
    • Webinars
    • Sponsor Insights
    • eProducts Info
    • White Papers
  • EVENTS
    • HVAC Contractor Forum
    • Industry Events and Webinars
  • MEDIA
    • Videos
    • AHR Expo 2025 Videos
    • Podcasts >
      • ACHR News Podcast
      • HARDI Podcasts
      • AHR Expo Podcasts
      • ACCA Podcasts
    • Interactive Spotlights
    • Quizzes
    • eBooks
    • HVAC Talkback
  • HVAC GROUP
    • ACHR NEWS >
      • Current Issue
      • Digital Edition
      • Subscribe
    • Distribution Trends
    • SNIPS NEWS >
      • Join SNIPS NEWS
    • Engineered Systems News >
      • Join ES News
    • HVACR Directory
    • Contests
    • Newsletters
    • Contact
    • Advertise
    • My Account
Home » Authors » John Tomczyk

Articles by John Tomczyk

HVAC Capillarry Tubes

All You Need to Know About HVAC Capillary Tubes, Part 2

Servicing these simple metering devices takes special skill
John Tomczyk
January 13, 2020
In this article, we will look take a closer look at capillary tube systems, as well as how to properly clean them.
Read More
HVAC Capillarry Tubes

All You Need To Know About HVAC Capillary Tubes, Part 1

Sizing these cost-effective metering devices is crucial to system performance
John Tomczyk
December 9, 2019
Most systems employing capillary tubes as metering devices do not require high-side receivers, which add to cost savings.
Read More
FROSTlines

Tracking Down the Cause of Compressor Motor Overheating

Voltage imbalance in three-phase system may be elusive reason for the problem
John Tomczyk
November 4, 2019
One of the more popular three-phase electrical services that is supplied to medium-size commercial buildings is the Wye or Star configuration transformer.
Read More
FROSTlines

Flooding, Migration, and Slugging of Compressors

Causes and cures for these troublesome conditions
John Tomczyk
October 7, 2019
When it comes to servicing compressors, technicians often encounter three issues: flooding, migration, and slugging.
Read More
Troubleshooting Air Conditioning Systems.

Troubleshooting Air Conditioning Systems, Part 3

How to diagnose air-side and refrigerant problems
John Tomczyk
September 9, 2019
This is the third installment in the air conditioning troubleshooting series, and will cover how to diagnose air-side and refrigerant problems.
Read More
Tips for Troubleshooting Air Conditioning Systems

Tips for Troubleshooting Air Conditioning Systems, Part 2

Liquid/suction line restrictions, over- and undercharges, and liquid subcooling
John Tomczyk
August 12, 2019
Troubleshooting an air conditioning system often concerns refrigerant, airflow, and mechanical problems, either individually or in combination.
Read More
How to Troubleshoot Air Conditioning Systems - The ACHR News

How to Troubleshoot Air Conditioning Systems

Inefficient compressors, noncondensables, and air temperature can affect performance
John Tomczyk
July 1, 2019
This article covers air temperatures entering the condenser, inefficient compressors, and noncondensables in the refrigerant system.
Read More
FROSTlines

Five Rules for Charging Refrigeration Systems

The charging process can be tricky without the help of these guidelines
John Tomczyk
June 10, 2019
When the nameplate charge is not specified, there are guidelines and techniques all technicians should follow when charging a system.
Read More
Tips for Troubleshooting the Low Side of a Refrigeration System - The ACHR News

Tips for Troubleshooting the Low Side of a Refrigeration System

Oil-logging can often cause restrictions
John Tomczyk
May 6, 2019
Oil-logging is often a major cause of low-side restrictions, and there are many ways in which evaporator and suction lines inside tubing can become oil-logged.
Read More
JT

Condensers Can Offer Valuable Insights Into System Operation

Measuring CTOA can help pinpoint problems in a refrigeration system
John Tomczyk
April 1, 2019
Troubleshooting the high side of a refrigeration system will often give service technicians valuable information. That’s because what happens in the condenser is a direct reflection of what is happening in the rest of the refrigeration system.
Read More
Previous 1 2 3 4 5 6 7 8 9 … 20 21 Next
Subscription Center
  • Create an Account
  • Start a Subscription
  • Manage My Account
  • Sign Up for Newsletters
  • Visit Customer Service
  • Update Preferences

More Videos

Sponsored Content

Sponsored Content is a special paid section where industry companies provide high quality, objective, non-commercial content around topics of interest to The News audience. All Sponsored Content is supplied by the advertising company and any opinions expressed in this article are those of the author and not necessarily reflect the views of The News or its parent company, BNP Media. Interested in participating in our Sponsored Content section? Contact your local rep!

close
  • Piggy Bank
    Sponsored byWatercress Financial

    Energy Prices, Inflation, and HVAC: What Today’s Homeowners Care About

  • Refrigerated Food
    Sponsored bySolstice Advanced Materials

    R-455A Refrigeration: A Cold Storage Solution for the Future

  • Airex Rooftop Units
    Sponsored byAirex Manufacturing Inc

    Consolidating Roof Penetrations: A Growing Trend in Multifamily HVAC Design

Popular Stories

HVAC-Price-Increase-graphic

HVAC Price Increase List: June 2026

Trump-Section-232.jpg

Trump Reduces Section 232 Tariffs on HVAC Equipment to 15%

Refrigerants-and-gauge.jpg

HVAC Industry Warns of Counterfeit Refrigerants Entering U.S. Supply Chain

Midea-training.jpg

HVAC Workforce Crisis Expands Beyond Technicians to Instructor Shortages

U.S. Supreme Court building

95% Furnace Efficiency Rule to Get New Hearing

View The ACHR NEWS
Centennial Anniversary Timeline

The ACHR News Timeline Chart
Submit a Letter
Submit a letter to our editors.

Events

November 6, 2025

Next-Gen Data Center Cooling: HVAC Innovation and Real-World Solutions

On Demand As AI workloads and high-density computing push traditional cooling methods to their limits, the data center industry is accelerating the adoption of next-generation HVAC technologies.

June 17, 2026

Decarbonization Without Disruption

This webinar will explore practical HVAC decarbonization strategies that minimize disruption while maximizing long-term performance and ROI.

View All Submit An Event

Poll

Summer Staff

Are you fully staffed for the summer season?
View Results Poll Archive

Products

BNI Mechanical/Electrical Square Foot Costbook, 2026 Edition

BNI Mechanical/Electrical Square Foot Costbook, 2026 Edition

See More Products
Decarbonization Without Disruption - Free Webinar - 6/17/2026

Sign Up. Stay Informed.

The #1 trusted source for the HVACR industry since 1926

SUBSCRIBE
  • RESOURCES
    • Advertise
    • Contact Us
    • Advisory Board
    • Classifieds
    • Submit a Letter
    • Directories
    • Store
  • ACCOUNT CENTER
    • Create an Account
    • Start a Subscription
    • Manage My Account
    • Sign Up for Newsletters
    • Visit Customer Service
    • Update Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • Instagram
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2026. All Rights Reserved BNP Media, Inc. and BNP Media II, LLC.

Design, CMS, Hosting & Web Development :: ePublishing