Service & Maintenance

Handling Assorted Water Heater Problems

January 7, 2008
The information provided here on assorted water heater problems assumes that the water heater was properly installed and was operating correctly before any problems developed. This is just a general guide to the most common water heating problems.
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Btu Buddy 57: A Lunch Discussion About Flue Vents

December 17, 2007
Btu Buddy and Bob meet for lunch and Bob has a question about the last service call. The job involved replacing the single-wall flue pipe with double-wall pipe. “You said that we had some unfinished business about the service call yesterday, yet you said that the call was complete. What did you mean?”
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Troubleshooting With Jim Johnson: An Electric Heating System That's Not Heating Enough

December 3, 2007
In this column, Jim Johnson, director of training for Technical Training Associates, presents a specific HVACR equipment problem and invites readers to submit their diagnosis. From those who submit the correct answer by the stated deadline, there will be a prize drawing.
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Btu Buddy 56: A Smelly Gas Furnace

November 19, 2007
Bob goes on a call to a house where the residents smell fumes when the furnace is running. He examines the flue connector from the furnace to the chimney and discovers it’s rusted to the point of falling apart. With the assistance of Btu Buddy, he replaces the single-wall vent pipe with a double-wall vent.
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Freezer Repair

November 5, 2007
A very common freezer repair trouble call is a frozen evaporator coil. When you open the door to inspect the coil, look around for signs of outside air migrating into the box.
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Btu Buddy 55: Evacuation Leak

October 22, 2007
Bob had changed a compressor and was just about ready to charge the system when a problem arose. He pulled a vacuum down to 500 microns but noticed a rise in the vacuum gauge to 1,000 microns. There was a leak and Btu Buddy assisted him in finding it.
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Troubleshooting With Jim Johnson: An Older Gas Furnace That's Blowing Cool Air

October 8, 2007
With this article, The NEWS is introducing a new online column called “Troubleshooting With Jim Johnson.” In this column, Jim Johnson, director of training for Technical Training Associates, will present a specific HVACR equipment problem and invite readers to submit their diagnosis.
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Btu Buddy 54: A Cooling Tower Starved for Water

September 24, 2007
Bob receives a call from the dispatcher to go to an office building that has a 100-ton system that is water-cooled. With the help of Btu Buddy, he finds that the water level in the cooling tower is low. They check the water fill circuit and discover a kink in the copper pipe.
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Beating the Heat

September 10, 2007
When you energize a motor, you get two outputs: a desirable one (work) and one that is not so desirable (heat). Equipped with this knowledge, you can understand why one of the criteria you must consider when selecting a motor for an application is the effect of operating temperatures on that motor.
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Btu Buddy 53: Helping on a 100°F Day

August 20, 2007
The temperature is 102° outside. The complaint is from a car dealership. The showroom temperature is 85° and the dealer is having a big sale the next day. Bob finds the a/c unit is already doing all it can. Btu Buddy shows Bob some tricks to get more out of the system.
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