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Home » Authors » Bill Johnson

Articles by Bill Johnson

Btu Buddy 52: Topping Off the Charge for a TXV System

July 23, 2007
By Bill Johnson
No Comments
In this installment of the Btu Buddy series, Bob and Btu Buddy meet on another job that has a low charge. This unit has a thermostatic expansion valve (TXV). They determine the evaporator is starved for refrigerant and check to see why.
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Btu Buddy 51: Topping Off the Charge for a Fixed Bore Metering Device System

June 18, 2007
By Bill Johnson
No Comments
In this edition of the Btu Buddy series, Bob works on a system that is not working up to capacity. He finds the suction service port is leaking, repairs it, and tops off the charge.
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Btu Buddy 50: Reciprocating Chiller With Fouled Condenser Tubes

May 21, 2007
By Bill Johnson
No Comments
In this installment of the Btu Buddy series, Bob goes on a service call to a motel where the chiller has shut down. He finds that both the water tower and the chiller's condenser tubes are dirty and require cleaning.
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Btu Buddy 49: Grounded Compressor Motor (Continued)

April 23, 2007
By Bill Johnson
No Comments
In this edition of the Btu Buddy series, Part 2 of last month’s article, Bob and Btu Buddy meet the next morning to change the compressor in the system.
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Btu Buddy 48: Grounded Compressor Motor

March 19, 2007
By Bill Johnson
No Comments
In this installment of the Btu Buddy series, a customer calls and says his heat pump is not running. Bob finds that the compressor is shorted to ground.
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Btu Buddy 47: How Air Gets Into a Hot Water Heating System

February 19, 2007
By Bill Johnson
No Comments
In this edition of the Btu Buddy series, Part 2 of the previous article, Bob returns to the motel that had a heating problem to determine how air got into the closed loop piping system.
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Btu Buddy 46: Air in a Hot Water Heating System

January 22, 2007
By Bill Johnson
No Comments
In this installment of the Btu Buddy series, the dispatcher sends Bob to a motel that is five stories high with the complaint that the top floor does not have any heat. Bob discovers air in the hot water heating system.
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Btu Buddy 45: Grounded Electric Heat Coil Causes Fan to Run

December 25, 2006
By Bill Johnson
No Comments
In this edition of the Btu Buddy series, Bob goes on a call where a heat pump indoor fan motor is coming on from time to time even when the thermostat is off. He finds that a grounded heat coil is causing the intermittent fan operation.
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Btu Buddy 44: Stolen Outdoor Unit for a Heat Pump

November 22, 2006
By Bill Johnson
No Comments
In this installment of the Btu Buddy series, Bob finds that a small retail store using a heat pump has had the outside unit stolen, most likely for the copper. He then moves on replacing the unit and preventing this from happening again.
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Btu Buddy 43: A Smoking Oil Furnace

October 23, 2006
By Bill Johnson
No Comments
In this edition of the Btu Buddy series, a customer smells smoke coming from her oil furnace. Bob checks it out and finds that the furnace is not drafting. He inspects the chimney and discovers an obstruction.
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