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Air Conditioning Freezing
There are a variety of things that can cause air conditioning freezing. The first thing to do is see if the indoor (evaporator-air handler) fan and compressor are both running at the same time.
by Mike Taitano
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Btu Buddy 41: Stopped Up Condensate Line
In this edition of the Btu Buddy series, Bob is dispatched to a home with water on the basement floor around the air handler. He determines that there is a condensate drain problem and he recommends installation of a condensate pump.
by Bill Johnson
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Troubleshooting HVACR Systems Using Superheat and Subcooling
Regardless of your experience, to troubleshoot the system it is essential that you have a solid understanding of the fundamentals of refrigeration — including the principles of superheat and subcooling. You also need to have the right tools and know-how to apply these principles to use the tool quickly and efficiently.
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Btu Buddy 40: High Head Pressure, Air in System
In this installment of the Btu Buddy series, Bob is on a no-cooling call where the a/c system had just been repaired due to a refrigerant leak. Unfortunately, he discovers air in the system because it had not been evacuated.
By Bill Johnson
For The NEWS
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Air Conditioning Troubleshooting
Are you a technician that needs to do some troubleshooting on a totally dead air conditioning unit? Grab your tools and crank up the can-do attitude. Here are some tips for troubleshooting that air conditioner.
By Mike Taitano
For The NEWS
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Stop Blowing Hot Air
If you want to keep equipment operating in peak condition, make sure you select the proper replacement fan blade when replacing a worn or damaged one. Proper fan blade selection can sometimes get overlooked.
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Practical Ice Maker Troubleshooting Tips
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.
By Mike Taitano
For The NEWS
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Btu Buddy 38: Frozen Evaporator on a 15-Ton Cooling Unit
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.
By Bill Johnson
For The NEWS
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The ABCs of DMMs
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
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.
By Bill Johnson
For The NEWS
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Servicing Thermostatic Expansion Valves
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
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.
By Bill Johnson
For The NEWS
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Btu Buddy 35: Heat Pump With a Stuck Check Valve
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.
By Bill Johnson
For The NEWS
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Btu Buddy 34: Handling A Stopped Up Oil Filter
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.
By Bill Johnson
For The NEWS
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Creating A ‘False Water Line’
The next time you're faced with replacing an old steam boiler that was attached to a two-pipe air vent system, try the old-timer’s trick. Remember that the replacement boiler is smaller in size and holds less water, thus requiring a boiler feed tank that acts as a reservoir for the new boiler.
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Btu Buddy 33: Frozen Heat Pump Outdoor Coil
In this edition of the Btu Buddy series, the dispatcher calls Bob and tells him a customer has a very frozen heat pump outdoor coil. After checking out the unit, Bob finds a bad fan capacitor.
By Bill Johnson
For The NEWS
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Servicing Gas Appliances – Part 3
This article is the third and final part of a three-part series on inspecting and servicing gas appliances. It provides information on furnace operation, combustion analysis, and the limit circuit.
By James L. Bergmann
For The NEWS
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Servicing Gas Appliances – Part 2
This article is part two of a three-part series on inspecting and servicing gas appliances. It covers thermostats/zone sensors, filters, the blower compartment, wiring, and the burner compartment.
By James L. Bergmann
For The NEWS
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Servicing Gas Appliances – Part 1
This article is part one of a three-part series on inspecting and servicing gas appliances. This part covers infiltration air and the ventilation air test, equipment efficiency, venting, and the three-part testing procedure for checking a heat exchanger.
By James L. Bergmann
For The NEWS
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Btu Buddy 31: A Heat Pump Blowing Cold Air
In this edition of the Btu Buddy series, Bob goes on a call where the customer is complaining about their heat pump blowing cold air. Bob explains the differences between a heat pump and furnace, and makes a couple adjustments to the system.
By Bill Johnson
For The NEWS
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