That whistling sound

When I first moved into the home I renting right now, there was this irritating whistle type sound coming out of the air vents every single time the central heating and air conditioning system unit would kick on.

For the first week I put up with it thinking this may be normal and will work itself out.

Well, that did not happen. So, looking into this further I found that the solution was simple. And I was glad I did not waste money on having to call a heating and air conditioning company. Because it turned out that the air vents were not fully opened! And in turn, the air flow would be blocking everytime the central heating and air conditioning system unit came on. So I got up on a ladder, went around the house and opened up every single air vent one by one to the fullest. Then after this, when the central heating and air conditioning system would come on it no longer made the whistle noise that had been going on since the day i moved in. Had I called the local heating and air conditioning company, this would have cost a few hundred dollars just to go around the house to open up a few lousy air vents. I know you are thinking shouldn’t the landlord or management pay for heat and a/c service? Ordinarily yes, however I have a special low rental rate with the clause that I take care of any issues that may arise around the house. So that is what I am doing now.

Indoor air cleaning system