Problem with AC unit:Temp really hot in one room only? Help

Your repairman can`t figure it out? You need a real repair tech if you want to diagnose and fix it right, most likely you need to upgrade ductwork to the room, you can do other things that might help, if the run is long and airflow poor put in an inline blower, or cut down other rooms vents, but you should know the temp at the coil so the coil does not freeze.

Is the bedroom upstairs and the living room downstairs?

If so, a simple *fix* is to block the return vents downstairs. $4.18 fixed the 'upstairs to hot' in my colonial home. I put those magnetic register covers on the downstairs return vents. This forces the system to pull most of the air from the hotter upstairs. A thread a week or so ago explained that it is not a good idea to block the supply registers because of the slight possibility of freezing the coil.

Even if you have a single story home blocking the return in the living room may help the problem if all of your supply registers are working.

What is an inline blower an where do you find them? Cost?

It's a one story home, 1500 sq ft So you're saying shut off the vents in areas BEYOND my registers?

BTW, My room is the 1st place the air goes which is why nothing makes sense to me.

So should I try the block off vent deal? How long before I know it's having an effect? thanks all

I would only suggest you try blocking off the *return* vents in the room(s) that are coolest. This would be to force the system to pull the air out of the hotter rooms. If your system only has one return vent, like in a hallway, this would not be an option to try.

You should notice a difference in a few hours if it is going to work.

Your answer is a new HVAC tech. The one you had ... Well let's say he may need a refresher course.

There are three possibilities.

1. Insufficient cool air getting to your room.

Check the inflow (volume and temperature) and the return air. Could there be a problem with the duct work or maybe leaking due to bad joints or whatever. Lack of proper air return is also an issue, do you get more cool air coming in if you open the door to the room?

1. Air coming in not cool enough.

Maybe a duct going through an attic with insufficient insulation.

1. Too much heat load.

Could the room have windows getting a lot of sun, poor insulation, or over a garage etc.

thanks

I have found that leaving the whole house fan on all the time (instead of auto position) on the thermostat helps keep the temperature differential down in my house by a noticable amount.

Only about .4 = .7 degrees cooler [and that's only when the sun is set[

Whole house fan on with the AC? A whole house fan goes in the upstairs ceiling, draws cool air in from outside, and forces it out via the attic.

As someone else asked, is this an upstairs bedroom? Where is it in relation to the duct runs? An upstairs room at the far end of the ducting run is worse case. It's not unusual to see systems installed with inadequate ducting to the far end. And if it's upstairs and the handler is in the basement, that can be a real bitch to try to run additional ducting to.

Make sure all the dampers in the path to that room are wide open. Also, if a register on the same path serves another room, say downstairs that is cool enough, closing the downstairs register will force more cool air to go to the upstairs one. In the winter, you'd want to reverse that, or leave both open.

The inline blowers that someone mentioned are available at the home center stores. I installed one in a similar situation and it made a noticeable improvement, though it didn't entirely solve it. I also increase the venting in my attic, which helped.

They also have booster blowers that just sit over the register and get plugged into an outlet. Never tried one of those, but it's easy to try and you can take it back if it doesn;t work well.

I'd also check if there is a return in the room in question. If not and one can be added that will help. If you try the advice of closing off returns in some of the cold areas, you want to be sure there is adequate return space somewhere else. Otherwise you will be affecting the efficiency of the whole system.

In some cases, from a practical standpoint, the best solution might be a small window unit to take care of that room.

I live in a rancher

And as indicated is the A/C air handler at the other side of your home?

Not the temperature of the air the volume of air.

The suck-in place, where the big filter goes is just outside my bedroom door in a hallway. Is that what you meant?

Wait, also My bedroom is one of the first 2 places the air goes, so it should be cooler than rooms farther from the unit, correct?

I have no way to measure the volume of air unles you can think of something??