Service & Maintenance

Study Tests Effectiveness of Rooftop Unit Preventative Maintenance

Looks at Whether Retailers Save Money by Minimizing Risk of Equipment Failure and Reducing Service Calls

Alpine Mechanical Services has announced the completion and results of a collaborative energy efficiency study on rooftop units conducted by Alpine Mechanical, Siemens Industry, and Nexant. The study tested the efficacy of HVAC preventative maintenance best practices in a retail environment.


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Btu Buddy 134: An Unusual Service Call

Bob and Tim were on their way to a no cooling call. The spring season was still cool at night and warm in the daytime. The customer told the dispatcher, “The unit started up at about 10:30 a.m. this morning and made a noise, but did not cool the house, even though it is still running.”


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Air-Fuel or Oxy-Fuel for Soldering and Brazing?

There Is a Time and Place for Both Processes in HVACR Applications

For the HVACR technician, the right tool for soldering and brazing pipe — an air-fuel or oxy-fuel torch — depends on the type and diameter of the pipe, its location, and considerations related to cost, safety, convenience, and ease of use. This article will examine those factors, as well as clarify some technical issues.


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Furnace Ignitor Problem

One of the most common furnace problems that I see is when the furnace hot surface ignitor will not glow. The furnace may have a bad ignitor, loose wire connections, open limit switch, open rollout switch, open pressure switch, or bad control board. This is what you might see in the furnace sequence of operation.


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2015 NCI Annual Summit

The National Comfort Institute held its 2015 Summit in San Diego. Posted: April 1, 2015.

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NEWSMakers: Andy Patron
Andy Patron, partner with FMI Corp., discusses the impact a national labor shortage may have on the mechanical contracting industry. Posted on March 27.
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2015 March 30

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2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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