My HVAC system is running for a very short time, then turns off and then makes this turning over noise. It's a 10 year old Amana heating and air conditioning unit. The sound seems to be coming from under the unit and away from it, which is on the ground floor in a closet. The only serial I can see is a goodman chpf3636b6cb.
Here is a timeline of what happens.
- HVAC system is turned on in "Heat" mode.
- Clicks on and everything sounds normal. Fans are pushing air thorough vents with low humming noises.
- Everything completely shuts off.
- Turning over noise happens in intervals of 30 to 45 seconds. Here is a sound clip of the noise. https://soundcloud.com/dbroadlick/hvac
The noise does not seem to emanate from the actual tower.