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Home » Authors » Jim Johnson
Jim Johnson

Jim Johnson

Jim Johnson is the director of training for Technical Training Associates, a Tucson, Ariz.-based firm that provides HVACR technician training DVDs/videos, E-books, and workshops. For more information, call 520-625-6847 or visit www.techtrainassoc.com. 

Articles

ARTICLES

Figure One: Diagram of an electric furnace.

Troubleshooting Puzzle: An Electric Furnace That’s Not Performing

Headshot johnson jim
Jim Johnson
October 9, 2021
No Comments
The equipment in this month’s troubleshooting problem is an electric furnace that has been in service for at least ten years and has no service history.
Read More
Heat-Pump-Diagram.jpg

Troubleshooting Puzzle: A Heat Pump That’s Not Heating Enough

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Jim Johnson
September 2, 2021
No Comments
In this troubleshooting situation, the equipment is a package unit heat pump that isn’t properly heating the customer’s home.
Read More
Wiring Diagram.

Troubleshooting Puzzle: A Reach-In Freezer That’s Not Keeping Product Frozen

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Jim Johnson
August 12, 2021
One Comment
In this troubleshooting situation, a restaurant manger is calling for service on a reach-in freezer, and the complaint is that the unit “isn’t freezing things hard.”
Read More
Rooftop-Unit-Schematic.jpg

Troubleshooting Puzzle: A Light Commercial Air Conditioner That’s Blowing Warm Air

Headshot johnson jim
Jim Johnson
July 10, 2021
One Comment
In this troubleshooting situation, the customer’s complaint is that their office air conditioner is “not cooling at all.”
Read More
Cooling-System-Figure-One.jpg

Troubleshooting Puzzle: A Comfort Cooling System That’s Not Performing

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Jim Johnson
June 13, 2021
No Comments
In this month’s troubleshooting situation, the equipment that needs servicing is a split system and the refrigerant flow control is handled via an EEV.
Read More
Rooftop Unit Diagram

Troubleshooting Puzzle: A Convenience Store That’s Not Comfortable

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Jim Johnson
May 8, 2021
No Comments
The customer is complaining that the temperature inside their small convenience store won’t get comfortable in the warmer part of the day.
Read More
Duct System Diagram.

Troubleshooting Puzzle: A Split System With Ongoing Complaints

Despite several service calls, the system isn’t keeping the homeowner comfortable
Headshot johnson jim
Jim Johnson
April 9, 2021
No Comments
The equipment in this month’s troubleshooting situation is a split system that has only been in service for two years, but there is a lot of history.
Read More
Electric Furnace Diagram.

Troubleshooting Puzzle: An Electric Furnace That’s Running Too Long

Headshot johnson jim
Jim Johnson
March 12, 2021
No Comments
Our troubleshooting problem involves a complaint from a customer who is concerned that their electric furnace is running excessively and wasting energy.
Read More
Under-Performing Heat Pump.

Troubleshooting Puzzle: An Under-Performing Heat Pump

Headshot johnson jim
Jim Johnson
February 5, 2021
2 Comments
In this troubleshooting situation, the customer’s description of the problem is that the unit is “running a lot, and not keeping the building warm.”
Read More
Troubleshooting-Puzzle

Troubleshooting Puzzle: A Gas Furnace That’s Not Heating

Headshot johnson jim
Jim Johnson
December 11, 2020
No Comments
Your troubleshooting situation this month involves an 80% single stage gas furnace that has been in service approximately seven years.
Read More
View All Articles by Jim Johnson
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