Your troubleshooting situation this month involves an 80% single stage gas furnace that has been in service approximately seven years. When you respond to the customer’s complaint of “no heat,” you ...

The customer in this particular troubleshooting situation is somewhat savvy about his 12-year-old gas furnace. When he calls for service, he tells you that when things got very cold in the house, he ...

Q: My daughter’s house has some new windows and some old ones. The house has gas-fired, warm-air heat. All the windows are soaked with condensation that has to be mopped up. Can you help? A: The first ...

Q. I would appreciate your opinion about ventless propane wall heaters. We have two of these heaters in our cottage and use them on a seasonal basis - short term in the spring and fall months. The ...