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 ...

Loud furnace noises and their causes . All furnaces make some noise during normal operation, including soft hums and gentle ...

It’s frustrating when a customer complains that their older, inefficient furnace did a better job heating their home than their new, high-efficiency furnace. Some common issues they mention are that ...