We just moved in to this 1992 built house, which has a 10 year old furnace. I constantly hear a knocking ( TAK TAK ) mixed with semi loud banging noise from the vents through out our house. It comes from different air ducts. However when I turn off the furnace altogether, the noise stops after a...

I had my air ducts cleaned a year ago (big big mistake) and immediately had a sickening odor. Had them re-cleaned and sanitized and still bad odor. Had evaporator coil cleaned and again 6 months later. Then had UV light installed. Now I have a chlorine odor that permeates everything in the...

Honeywell digital t-stat for a heat-pump is wired wrong. Only get heat. Here is how it is currently wired: C=black Y=yellow G=green O/B=orange Rc=jumped to R R=red

OK... my central heat and air is on usually all of the time set at 78 degrees... so two days ago when it kicked on it started making this noise (a screeching noise) and it got louder so I turned it off. I went out to look into the unit (its on the ground) so see if anything was caught in the fan or...

We just moved to a new home that is about 3500 square feet and has a basement. I know part of it, is just getting used to the new sounds. However, our heater, when it shuts off, makes a huge 'BOOM' sound! Is that just the way it goes? Also, after the heater shuts off... the fan must still be...