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.
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.
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.
This article is a guide for identifying the most common problems encountered in fans and air-handling systems. This is often an "art" and not a "science" because many problems are subtle and hard to diagnose.
In this installment of the Btu Buddy series, the customer's building is warmer than normal. Btu Buddy notes that this system has capacity control. Bob finds that one of the solenoid valves is not working.
In this edition of the Btu Buddy series, Bob is dispatched to a home with water on the basement floor around the air handler. He determines that there is a condensate drain problem and he recommends installation of a condensate pump.
Regardless of your experience, to troubleshoot the system it is essential that you have a solid understanding of the fundamentals of refrigeration - including the principles of superheat and subcooling. You also need to have the right tools and know-how to apply these principles to use the tool quickly and efficiently.