In this troubleshooting situation a technician has responded to a complaint of “not cooling” on a six-year-old R-410A split system that employs an upflow gas furnace indoor air handler and a condensing unit that sits on the ground, and there is less than 20 feet of connecting tubing.

Bob and Tim were on their way to a service call at a store that has a frozen heat pump outdoor unit. It is late in the season and the customer called and said, “Our outdoor unit is frozen solid with ice.” After they arrived and talked to the owner, Bob said, “Let’s put the unit through a forced defrost.”

The most important approach to an ice machine repair to keep in mind is to remember that it is part of the HVAC family. What this means is that most ice machines stop working due to being dirty, either the air or water aspect part of the machine.

Bob and Tim were on their way to a no heat call for a gas furnace. Tim asked, “What do you think we need to look out for on this call?” Bob said, “It could be any number of things. We will start by talking to the homeowner and see what she knows.”

This troubleshooting situation centers around an older 3-ton split comfort cooling system, and the customer is calling because their home is “just not comfortable.” The homeowner also tells the dispatcher that while the unit is operating and air is coming out of the registers, the temperature in the house is too warm.

With the heating season in full force, it is a good time to review best practices in heating troubleshooting. This article covers boilers. The following information is a summarized section from HVAC Troubleshooting, a guide book published by BSRIA, a test, instruments, research, and consultancy organization headquartered in the UK.

Bob and Tim were on their way to a service call on a heat pump. The homeowners are complaining about noise at the outdoor unit. When Bob and Tim arrived, the homeowners explained that the heat pump for upstairs is beside the house in a wooded area. It is under their upstairs bedroom window and it became loud last night.

The Environmental Hygienists Association (E.H.A.) announced that it is now providing online certified mold inspector and certified mold remediator training and certification for HVAC contractors, plumbers, and other contractors so that they can effectively find and eliminate toxic mold growth in customers’ homes and workplaces.

Bob and Tim were on their way to a service call where the customer is complaining about a high power bill. She said the heat pump that they use for their heat is running all the time and their power bill is really high.

In this troubleshooting situation you’ve been called to a restaurant to check an ice machine that, according to the customer, “isn’t working like it should.” You find that you’re dealing with a 240-volt, single-phase machine that has a remote condenser, and it also employs a small air compressor to provide air to assist in freeing the cubes.