Not all of the vents in my house seem to be working properly, and my thermostat sometimes is set higher, then what the
house temperature reads. Examples: Thermostat gets turned to 68 and 5 hours later, it says it is 63 in here. I can feel heat coming out of some vents, but not others, or else it felels like cooler air coming out. I just had a new circuit board put in three years ago, nothing is obsturcting the vents and I did check to make sure they were all open. Any suggestions? I am tired of freezing in the smaller of two bathrooms, and a couple of other rooms. HELP!!!
First have you checked your filters lately? dirty filters do not pass as much air. If you have obstructions the air will flow in the path of least resistance, so the vents that are the furthest away may suffer.
Many duct cleaning outfits have bore-o-scopes that are small TV cameras on a long ...»
General air sealing in the home will also help.
Woodbridge Environmental Tiptophouse.com is one of our heating and hvac experts here.
If return ducts are located or supply for that matter were they are exposed to outside air temps, this will prevent the entire system from properly heating.
A incorrectly set up thermostat can also cause all sorts of issues.
A messed up circuit board or one that is not proper for the system it was installed in can ...»
As KMS said dirty filters or a blockage in the ducts can be something to consider. However I doubt the duct is blocked unless perhaps yours are lined on the inside.
A large balancing damper also can cause issues. If the damper closed down, but still reads open can cause all sorts of problems.
The thermostat location and the way its mounted can also be problematic. If the wall behind the thermostat has air flowing through it, perhaps cold or warm air it can mess up the readings and cause issues. If the thermostat is not properly set up for the fuel system and the enthalpy setting is wrong in it. The house will remain cold all the time.
Poor duct design is still another issue. Poor installation practices or really old systems oftentimes fails to deliver the air.
A short cycling of the furnace will keep air temps down.
The very first thing I would ask, Did the system ever work right in the past? I know as someone who has done this work for years. Many HVAC contractors reinvent the engineering of both residential and commercial systems in order to up sell people into products that they do not need or want. Way to many of these arm chair engineers sell products and services that completely change the way the system was designed to work. Once that occurs the client who is not happy goes to another contractor who again changes it in an effort to make it work. If they ever simply put it back the way it was when it was first designed. The issue can be solved.
As an airplane pilot, one of the very first things we learn when we start out is. If you turn off a switch, or turn a dial and it gets real quite in the plane. Put that switch or dial right back were you found it so it becomes noisy again. This holds true with any home improvement project. If you change anything and the outcome is not what you expected simply put it back and try something else. In your case, did the issues begin when they changed the circuit board?
In addition, if the AC system is located in the attic, you may want to consider insulation on the roof (foam) to bring the system into the heating/cooling zone. This in effect will lower the ...»
Also you want the contractor, whoever it is that you use to do two things, and if they say they do not need to do them, find another. A manual J which is a heat load form and a manual D which is a duct sizing form that tells then exactly what size ducts are required to properly heat and cool the room as far as delivery of air is concerned.