Service & Maintenance

Servicing Thermostatic Expansion Valves

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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

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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

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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

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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

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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

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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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Creating A ‘False Water Line'

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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

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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.
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Servicing Gas Appliances – Part 3

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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.
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Btu Buddy 32: Carbon Monoxide Problem With Gas Furnace

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In this installment of the Btu Buddy series, Bob goes on a call where a carbon monoxide detector alarm is sounding off. He finds that a fireplace is contributing to the problem.
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Mini Split Installation

Twin Cities contractor Aabott Ferraro helped retrofit an older St. Paul home.

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NEWSMakers: Jeff Nusz

Jeff Nusz, president, Reitmeier HVAC Services, Tualatin, Oregon, joins the program to discuss how he modernized his website and gained new clients and more money because of it. We’ll go through the process of the change and much more.  Posted on Aug. 1.

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2014 July 28

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Prohibiting HFCs

EPA is proposing a rule that would prohibit some HFCs in select refrigeration applications. Do you agree with this move?
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2014 National Plumbing & HVAC Estimator

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