Bob and Tim were on their way to a no heat call. It was an oil heat application and Tim was anxious to work on an oil system. He had not seen an actual oil heat installation, only in the school lab. Those are great, but not like the real thing at a customer’s house.
Today more and more systems are incorporating microprocessor controllers into their design. Troubleshooting the operation of these controllers can be a little tricky at times, but if broken down into sections it can be easier to handle.
In this month’s troubleshooting problem we have a customer who can only tell us that their heat pump “isn’t working” and “the temperature in the building isn’t right.” When you arrive, you confirm the system isn’t operating properly. The indoor fan motor is running normally, but the building temperature is far from the thermostat set-point.
Residential air leakage training with intro to large building testing presented by Retrotec. NEBB’s Sound and Vibration Certified Professional Seminar presented by the National Environmental Balancing Bureau.
Bob and Tim were on their way to a residence outside of town where the homeowners’ complaint was excess humidity in the house. When they arrived, they met the housewife and she told them, “The plumbing fixtures often sweat, there is mold in some of the closets, and mold is beginning to form in the laundry room.”
The NEWS has announced the publication of a new eBook, HVACR Service + Troubleshooting with The Professor, by John Tomczyk, a renowned HVACR professor at Ferris State University and a NEWS columnist.
This troubleshooting problem brings you to a three-bedroom, ranch style home on a concrete slab, which, as most typically do in this area of the Southwest, employs a rooftop evaporative cooling system in the summer and an upflow forced-air gas furnace for heating in the winter. The customer says one of the bedrooms “just won’t get comfortable.”
Get insight from John Tomczyk, NEWS columnist and renowned HVACR professor at Ferris State University in Big Rapids, Mich., through his “HVACR Service + Troubleshooting with The Professor” eBook.
One type of starting relay used on fractional-horsepower compressors is the current relay. A defective current relay can cause a compressor not to start. One popular method of troubleshooting this type of starting relay is with an ohmmeter.
Bob and Tim have been sent on a call to a house with no cooling. The system has just been installed and the construction crew has been having problems with startup. The system has a capillary tube metering device and Bob and Tim begin looking at what may be wrong.
