The homeowner’s letter started with the word “help.”
It seems he was told by a salesman that “furnaces run at high speed during the cooling cycle; but we purchased [our] furnace only to find out that this model runs at its lowest speed (600 cfm) when the air conditioner is on.”
They discovered that the air conditioner never shuts off, “because the cold air isn’t forced to rise above floor level and the thermostat temperature doesn’t lower.” After many visits from a technician, these homeowners were finally told that the furnace is doing what it’s supposed to do.
“The ducting is also brand new, the filter is cleaned regularly, our home is 950 square feet, and we live in southern Ontario, so cooling the house shouldn’t be difficult. I have been told by other sources that this will only work in homes that have ceiling air intake vents which we were never told were necessary.”
In a nutshellLocation: 950-sq-ft home in Ontario Equipment:
- Brand-new, noninsulated ductwork in good condition per visual inspection (replaced existing ductwork from older gas system);
- 60,000-Btu gas-fired furnace;
- 1.5-ton, split-system air conditioner;
- Electronic air cleaner and bypass humidifier.
OK, Tech Heads: Is this a communication problem between the tech, the contractor, and the homeowner? Does the contractor and/or homeowner not fully understand the system’s operation? Are there problems with the t-stat or wiring? Or could it be the equipment itself?
How would you handle this service call?
Let’s start talking. Please send your replies to Troubleshooting/ Maintenance Editor Barb Checket-Hanks, no later than March 27, by e-mail (email@example.com) or fax (248-362-0317). Answers will be published in an upcoming issue of The News.