Refrigeration

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Checking temperatures in and out of the air conditioning coil is an important part of preparing a residential air conditioning system for the season. This article will cover how checking temperatures through an evaporator coil can tell a service technician if there’s a problem in the air-handling system or refrigerant system. It will also cover other general troubleshooting areas.

Verifying a diagnosis will take additional time, but this is time well spent. It will actually save time and money for both the technician and the customer by reducing the amount of callbacks and reducing the replacement of non-defective components on the job. It will also allow the technician to leave the job with peace of mind, knowing he has made a correct diagnosis.

EDITOR’S NOTE: This is part two of a two-part series. The first part, "Tips for Surviving Refrigerant Transitions, Part 1," appeared in the Feb. 1, 2016, issue of The NEWS.

Danfoss hosted its 21st annual press briefing Jan. 26 during the 2016 AHR Expo in Orlando, Florida. Titled “Engineering Tomorrow,” this year’s briefing explored four major challenges facing the HVACR industry — climate change, energy productivity, connectivity, and a growing skills gap.

In follow-up to the document that Tecumseh issued in June 2015 regarding recommended refrigerants, the company has continued to test various low-global warming potential (GWP) options with the objective of determining suitable replacements for R-404A and R-134a.