Articles by Bill Johnson

Btu Buddy 111: Burned Hermetic Compressor - Part 2

June 18, 2012
Bob and Tim have gone back to the job with the grounded compressor. They changed the compressor yesterday and ran the unit for a few minutes, then shut the system down, leaving the crankcase heat on so they could start it up later. They now want to determine why the compressor burned.


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Btu Buddy 110: Burned Hermetic Compressor - Part 1

May 21, 2012
Bob and Tim were on their way to a no cooling call at a commercial building. When they arrived, they talked to the building manager and checked the thermostat. It was set at 72°F but the thermometer was reading 78°. Tim said, “The fan is running, so there is control voltage and the thermostat seems to be calling for cooling.”


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Btu Buddy 109: Preventing Copper Theft

April 23, 2012
Bob and Tim were just finishing a service contract call when they were contacted by the dispatcher about a no cooling call at a new installation at a small retail store. The weather was unusually warm for this time of the year.


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Btu Buddy 108: Service Call on a Gas Furnace

March 19, 2012
Bob and Tim have been sent on a routine service contract call to a new customer. The system is a gas furnace with central air conditioning. After changing the filter and oiling the fan motor, Tim went to the thermostat and caused the furnace to come on and they were looking at the burner when Tim said, “That gas flame doesn’t look right.”


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Btu Buddy 107: Heat Pump Service Call - Part 2

February 20, 2012
Bob and Tim are continuing a service call on a heat pump that has two failed auxiliary heaters. When they went to the supply house to get new heaters, they left wondering if the heat pump itself was operating up to capacity. After replacing the defective heaters, Bob suggested a visual inspection of the heat pump.


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Btu Buddy 106: Heat Pump Service Call - Part 1

January 23, 2012
Bob and Tim have arrived at a home where the owner is complaining that the heat pump is not heating properly. It has been getting cold in the home during the late night and early morning hours. It’s really cold outside, about 10°F at night and 25° during the day.


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Btu Buddy 105: Furnace Vent Problem

December 19, 2011
Tim and Bob have been sent on a service call to a new customer’s house. The homeowner has an unusual complaint. She said that she thinks she has a furnace problem because there is mold in her house. They don’t know what this can be all about.


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Btu Buddy 104: Bob and Tim Continue Heat Pump Repairs

November 21, 2011
Bob and Tim have arrived back at the apartment building where they have been working for several days inspecting and making necessary repairs to the building’s split-system heat pumps. Bob said, “Check the list for another unit that seemed to have a problem and let’s take a closer look at it.”


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Btu Buddy 103: Bob and Tim Begin Heat Pump Repairs

October 24, 2011
Bob and Tim have arrived at the apartment house that they have been working at for the last several days. They’ve gone to the roof where the outdoor units are located. There are 60 heat pumps that use R-22 as the refrigerant. They start with Unit No. 2.


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Btu Buddy 102: Continuing the Inspection of Multiple Split-System Heat Pumps

September 19, 2011
Bob and Tim are on the second day of an inspection of an apartment house building that has multiple split-system heat pumps. They have inspected all 60 outdoor units on the roof. They are now going to inspect the indoor units.


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