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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

Duct System Diagram.

Troubleshooting Puzzle: A Split System With Ongoing Complaints

Despite several service calls, the system isn’t keeping the homeowner comfortable

April 9, 2021

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.

Electric Furnace Diagram.

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

March 12, 2021

Our troubleshooting problem involves a complaint from a customer who is concerned that their electric furnace is running excessively and wasting energy.

Under-Performing Heat Pump.

Troubleshooting Puzzle: An Under-Performing Heat Pump

February 5, 2021

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.”

Troubleshooting-Puzzle

Troubleshooting Puzzle: A Gas Furnace That’s Not Heating

December 11, 2020

Your troubleshooting situation this month involves an 80% single stage gas furnace that has been in service approximately seven years.

Wiring-Diagram

Troubleshooting Puzzle: A Chilly House

November 6, 2020

In this troubleshooting situation, the equipment is a gas pack, and the resident has called for service because the building “isn’t warm at all.”

October-Troubleshooting

Troubleshooting Puzzle: A Walk-In Freezer That’s Operating Erratically

October 12, 2020

In this troubleshooting situation, you are dealing with equipment that has only been in operation for two months.

Troubleshooting-Puzzle

Troubleshooting Puzzle: An Ice Machine That’s not Keeping up With Demand

September 5, 2020

In this puzzle, a restaurant manager complains that one of the ice machines in his high-volume establishment isn’t producing enough ice.

Troubleshooting-August

Troubleshooting Puzzle: An Ice Machine That Isn’t Dispensing Cubes Properly

August 5, 2020

In this troubleshooting situation, you have been called to a restaurant to check an older model ice machine that isn't working like it should.

Troubleshooting-July

Troubleshooting Puzzle: A System That’s Blowing Warm Air In July

July 15, 2020

This month’s troubleshooting situation involves an air-to-air, package unit heat pump that is approximately nine years old.

Troubleshooting-Puzzle

Troubleshooting Puzzle: A Reach-In That’s Not Maintaining Temperature

June 9, 2020

In this month’s troubleshooting problem, the equipment is a reach-in food and beverage storage unit.

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