Service & Maintenance

Practical Ice Maker Troubleshooting Tips

May 29, 2006
Ice maker troubleshooting is easier if you take it one step at a time. In this article the author goes step-by-step through the most common ice maker troubleshooting calls.
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Btu Buddy 38: Frozen Evaporator on a 15-Ton Cooling Unit

May 15, 2006
In this installment of the Btu Buddy series, Bob finds a restaurant system that froze solid the previous night because the thermostat was turned down to 55 degrees. Btu Buddy suggests possible solutions to prevent it from happening again.
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The ABCs of DMMs

May 1, 2006
What exactly is a digital multimeter (DMM) and what can you do with it? How do you make measurements safely? What features do you need? What's the easiest way to get the most out of your meter? These and other questions are answered in this article.
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Btu Buddy 37: An Oil Furnace With Sooted Electrodes

April 17, 2006
In this edition of the Btu Buddy series, Bob goes on a call where an oil furnace won't always start. He discovers heavily sooted electrodes. Btu Buddy assists him in servicing the burner and cleaning the electrodes.
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Servicing Thermostatic Expansion Valves

April 3, 2006
The thermostatic expansion valve (TEV or TXV) is erroneously considered by some to be a mysterious and complex device. Here we discuss typical valve complaints, causes, and remedies.
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Btu Buddy 36: High-Efficiency Cooling in Mild Weather

March 20, 2006
In this installment of the Btu Buddy series, Bob finds that a customer's heat pumps are losing cooling capacity operating in mild temperatures. With Btu Buddy's help, he discovers that the units' evaporators are starved for refrigerant.
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Quick Facts: TXV Selection and Sensing Bulb Location

March 6, 2006
Learn how to select a thermostatic expansion valve (TXV) for a particular application and what is the correct position for the TXV sensing bulb.
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Btu Buddy 35: Heat Pump With a Stuck Check Valve

February 20, 2006
In this edition of the Btu Buddy series, a customer with a heat pump is seeing his auxiliary heat light stay on almost all the time. With Btu Buddy's help, Bob finds that a check valve in the refrigerant circuit is stuck open.
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Troubleshooting the Refrigeration Cycle for Mechanical Problems

February 6, 2006
This article describes how to troubleshoot a compressor and the associated problems that can cause a system to fail prematurely. It discusses the proper methods of diagnosing and repairing system problems.
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Btu Buddy 34: Handling A Stopped Up Oil Filter

January 23, 2006
In this installment of the Btu Buddy series, Bob services an oil furnace and discovers a plugged up oil filter. Btu Buddy explains the cause of the problem and assists him in correcting it.
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