Service & Maintenance

Btu Buddy 68: Oil Burner Rumble

November 17, 2008
The dispatcher calls Bob to go to a new customer who is complaining about a rumbling noise that her furnace is making when it shuts down. The customer’s furnace uses fuel oil. Bob knows that there is an after-burn going on but he doesn’t know why. Btu Buddy explains how to fix it.
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Troubleshooting Challenge: A Furnace With a Flashing Fault Code

November 3, 2008
In this month’s troubleshooting situation, we find ourselves dealing with a condensing furnace, and the customer has called to say that “there’s no heat at all.” It’s a relatively small unit, rated at only 40,000 Btu, but it is equipped with an LED readout system that flashes a fault code in the event of a breakdown.
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Btu Buddy 67: Was the Charge Really Low?

October 20, 2008
The dispatcher sends Bob to a new customer for a routine system tune-up. The system is a 3-ton cooling unit with a capillary tube metering device. After checking the system, Bob determines that its low-side symptoms show a low charge. Btu Buddy, however, suggests that he consider other possible causes.
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Handling Central Air Conditioning Condenser Problems

October 6, 2008
If your central air conditioning condenser problem is that the compressor and condenser fan won’t run, this article lays out a series of troubleshooting steps to help you in identifying and correcting the problem. By the time you make all these checks, if the problem was electrical, you should find it.
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Btu Buddy 66: Spring Startup for Water-Cooled Systems

September 22, 2008
Bob and Btu Buddy meet for lunch in a restaurant so they can discuss water-cooled systems. Btu Buddy tells him about the pros and cons of air-cooled and water-cooled equipment. Bob then asks how to start up a water-cooled system in the spring and be assured that it will provide good service all summer.
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Troubleshooting Challenge: A Heat Pump That's Not Cooling at All

September 8, 2008
It’s the middle of July, and a customer calls to say that the unit that heats and cools their small office “isn’t cooling at all.” When you arrive, you find a 230-V, eight-year-old, rooftop package unit heat pump with three-phase compressor. After an evaluation of the system, you'll be asked a three-part troubleshooting question.
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Btu Buddy 65: Chiller With High Head Pressure

August 18, 2008
The day is scorching hot and Bob gets a call to go to an office building because the air conditioning system is off. It is a water-cooled chiller located in the basement with the water tower on the roof of the building. Btu Buddy assists Bob as he finds that the condenser tubes are dirty and require cleaning.
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Troubleshooting Tips for Air Conditioner and Refrigeration Compressors

August 4, 2008
Most compressors fail due to system malfunctions, which must be corrected to prevent repeat failures. After a compressor fails, field examination of the failed compressor often will reveal symptoms of system problems. Corrections will help eliminate future failures.
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Btu Buddy 64: Charging an Overcharged System

July 21, 2008
Bob receives a call from the dispatcher that a system is not cooling properly. It is a small office with a 4-ton unit that uses a capillary tube metering device. Bob discovers that the system had been overcharged. With Btu Buddy's help, Bob then proceeds to properly charge the system.
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Caring for a Small Motor's Sleeve Bearing System

July 7, 2008
When it comes to assuring that a motor provides consistent service for the longest time possible, it’s important to pay attention to the bearing system. Bearing system failures are one of the most common mechanical breakdowns in the field.
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