Our house has a 15 year old gas furnace. When it fires up, you can hear this series of events:
- A fan blowing
- A few clicks
- Steady blue flames
- A big whoosh (like the sound of something going up in flames)
- Then it blows hot air, cycling off and on every 5-10 minutes, unable to heat above 67 degrees.
I went in to do a little winter maintenance--changing the filter, removing debris, and so on. Now, when firing up, the first three steps are the same (blowing air, a few clicks, then blue flames). But, now there's no big whoosh and the hot air blows steadily until the house reaches the desired temperature.
In short, we're happier with it now. But, I wanted to make sure that we didn't disable something important by eliminating the big whoosh noise and the cycling off and on.
If you've got a hunch, please weigh in.