One of the bedrooms in my house has a problem heat in the summer and cold in the winter. It being summer here, it's immediately warmer in the room as soon as you step in from the hallway. The problems has gotten worse with time over the last several years. We've sent people up to check out the AC unit and make sure we're not just venting cold air into the attic, but every one we've sent up has said it's not related to the AC. We then had more insulation blown into the attic, with extra being placed in the back where the bedroom is. Our next step is opening the walls and replacing the insulation there, as the bedroom has three exterior walls. Does anyone have an idea if it could be anything else?
I would check / change the distribution box next to the Air Handler and the duct size to that particular room.
Engineering wise it was probably sized for the room not for the fact that it has 3 walls to the outside!
Why over time has it become worse ?
Good question now to the second issue you have. Your Fan in the Air handler is not running as fast as it used to, bad bearings, bad capacitor or some other failure. Your system could have a blockage of sorts as well.
- I would change the duct size and also adjust the distribution box to move more air to that room.
- Check the Fan, the Fan bearings / check or replace the Fan capacitor.
If this is the only room with 3 walls then that is probably the reason for the difference temperatures in that room compared to the rest of the house. For example; a room with 1 wall has a heat loss or heat gain from 2 surfaces, the (ceiling and that 1 wall) a room with 2 walls has a heat loss or heat gain from 3 surfaces, (the ceiling and those 2 walls) and so forth. Solutions to this problem are few. In my house just north of Pittsburgh, Pa. I have a bedroom with 1 extra wall and it is the room that is hard to heat and hard to cool. To help this room I run the furnace fan 24 hours a day on a low speed for continuous air circulation. This helps to even out the temperature but there is still a difference from the rest of the house. Nothing I have done in the 18 years we have lived here has corrected the problem. Adding an extra supply duct did the most to correct this problem. When you have a room with extra walls the best solution would be to have a separate heat/cool unit for that room but that is not cost effective. Hope this Information helps. Lastly what type air ducting system do you have and do you have a central return or a return in each room, do the doors stay open in this room. More info will help people make better suggestions.